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<h1>Source code for searx.botdetection.config</h1><div class="highlight"><pre>
<span></span><span class="c1"># SPDX-License-Identifier: AGPL-3.0-or-later</span>
<span class="sd">"""Configuration class :py:class:`Config` with deep-update, schema validation</span>
<span class="sd">and deprecated names.</span>
<span class="sd">The :py:class:`Config` class implements a configuration that is based on</span>
<span class="sd">structured dictionaries. The configuration schema is defined in a dictionary</span>
<span class="sd">structure and the configuration data is given in a dictionary structure.</span>
<span class="sd">"""</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">__future__</span><span class="w"> </span><span class="kn">import</span> <span class="n">annotations</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">Any</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">copy</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">typing</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">logging</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">pathlib</span>
<span class="kn">from</span><span class="w"> </span><span class="nn">..compat</span><span class="w"> </span><span class="kn">import</span> <span class="n">tomllib</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'Config'</span><span class="p">,</span> <span class="s1">'UNSET'</span><span class="p">,</span> <span class="s1">'SchemaIssue'</span><span class="p">]</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
<span class="k">class</span><span class="w"> </span><span class="nc">FALSE</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""Class of ``False`` singleton"""</span>
<span class="c1"># pylint: disable=multiple-statements</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">msg</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">msg</span> <span class="o">=</span> <span class="n">msg</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__bool__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">msg</span>
<span class="fm">__repr__</span> <span class="o">=</span> <span class="fm">__str__</span>
<span class="n">UNSET</span> <span class="o">=</span> <span class="n">FALSE</span><span class="p">(</span><span class="s1">'<UNSET>'</span><span class="p">)</span>
<div class="viewcode-block" id="SchemaIssue">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.SchemaIssue">[docs]</a>
<span class="k">class</span><span class="w"> </span><span class="nc">SchemaIssue</span><span class="p">(</span><span class="ne">ValueError</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Exception to store and/or raise a message from a schema issue."""</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">level</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Literal</span><span class="p">[</span><span class="s1">'warn'</span><span class="p">,</span> <span class="s1">'invalid'</span><span class="p">],</span> <span class="n">msg</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">level</span> <span class="o">=</span> <span class="n">level</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="sa">f</span><span class="s2">"[cfg schema </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">level</span><span class="si">}</span><span class="s2">] </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="si">}</span><span class="s2">"</span></div>
<div class="viewcode-block" id="Config">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config">[docs]</a>
<span class="k">class</span><span class="w"> </span><span class="nc">Config</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""Base class used for configuration"""</span>
<span class="n">UNSET</span> <span class="o">=</span> <span class="n">UNSET</span>
<span class="nd">@classmethod</span>
<span class="k">def</span><span class="w"> </span><span class="nf">from_toml</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">schema_file</span><span class="p">:</span> <span class="n">pathlib</span><span class="o">.</span><span class="n">Path</span><span class="p">,</span> <span class="n">cfg_file</span><span class="p">:</span> <span class="n">pathlib</span><span class="o">.</span><span class="n">Path</span><span class="p">,</span> <span class="n">deprecated</span><span class="p">:</span> <span class="nb">dict</span><span class="p">)</span> <span class="o">-></span> <span class="n">Config</span><span class="p">:</span>
<span class="c1"># init schema</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"load schema file: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">schema_file</span><span class="p">)</span>
<span class="n">cfg</span> <span class="o">=</span> <span class="bp">cls</span><span class="p">(</span><span class="n">cfg_schema</span><span class="o">=</span><span class="n">toml_load</span><span class="p">(</span><span class="n">schema_file</span><span class="p">),</span> <span class="n">deprecated</span><span class="o">=</span><span class="n">deprecated</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">cfg_file</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"missing config file: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">cfg_file</span><span class="p">)</span>
<span class="k">return</span> <span class="n">cfg</span>
<span class="c1"># load configuration</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"load config file: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">cfg_file</span><span class="p">)</span>
<span class="n">upd_cfg</span> <span class="o">=</span> <span class="n">toml_load</span><span class="p">(</span><span class="n">cfg_file</span><span class="p">)</span>
<span class="n">is_valid</span><span class="p">,</span> <span class="n">issue_list</span> <span class="o">=</span> <span class="n">cfg</span><span class="o">.</span><span class="n">validate</span><span class="p">(</span><span class="n">upd_cfg</span><span class="p">)</span>
<span class="k">for</span> <span class="n">msg</span> <span class="ow">in</span> <span class="n">issue_list</span><span class="p">:</span>
<span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">msg</span><span class="p">))</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">is_valid</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"schema of </span><span class="si">{</span><span class="n">cfg_file</span><span class="si">}</span><span class="s2"> is invalid!"</span><span class="p">)</span>
<span class="n">cfg</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">upd_cfg</span><span class="p">)</span>
<span class="k">return</span> <span class="n">cfg</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cfg_schema</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">deprecated</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]):</span>
<span class="w"> </span><span class="sd">"""Constructor of class Config.</span>
<span class="sd"> :param cfg_schema: Schema of the configuration</span>
<span class="sd"> :param deprecated: dictionary that maps deprecated configuration names to a messages</span>
<span class="sd"> These values are needed for validation, see :py:obj:`validate`.</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cfg_schema</span> <span class="o">=</span> <span class="n">cfg_schema</span>
<span class="bp">self</span><span class="o">.</span><span class="n">deprecated</span> <span class="o">=</span> <span class="n">deprecated</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cfg</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="n">cfg_schema</span><span class="p">)</span>
<span class="k">def</span><span class="w"> </span><span class="fm">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
<div class="viewcode-block" id="Config.validate">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.validate">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">validate</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cfg</span><span class="p">:</span> <span class="nb">dict</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Validation of dictionary ``cfg`` on :py:obj:`Config.SCHEMA`.</span>
<span class="sd"> Validation is done by :py:obj:`validate`."""</span>
<span class="k">return</span> <span class="n">validate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cfg_schema</span><span class="p">,</span> <span class="n">cfg</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">deprecated</span><span class="p">)</span></div>
<div class="viewcode-block" id="Config.update">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.update">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">upd_cfg</span><span class="p">:</span> <span class="nb">dict</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Update this configuration by ``upd_cfg``."""</span>
<span class="n">dict_deepupdate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cfg</span><span class="p">,</span> <span class="n">upd_cfg</span><span class="p">)</span></div>
<div class="viewcode-block" id="Config.default">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.default">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Returns default value of field ``name`` in ``self.cfg_schema``."""</span>
<span class="k">return</span> <span class="n">value</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">cfg_schema</span><span class="p">)</span></div>
<div class="viewcode-block" id="Config.get">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.get">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="p">:</span> <span class="n">Any</span> <span class="o">=</span> <span class="n">UNSET</span><span class="p">,</span> <span class="n">replace</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span>
<span class="w"> </span><span class="sd">"""Returns the value to which ``name`` points in the configuration.</span>
<span class="sd"> If there is no such ``name`` in the config and the ``default`` is</span>
<span class="sd"> :py:obj:`UNSET`, a :py:obj:`KeyError` is raised.</span>
<span class="sd"> """</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_parent_dict</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">UNSET</span><span class="p">)</span>
<span class="k">if</span> <span class="n">val</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">if</span> <span class="n">default</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">default</span>
<span class="k">if</span> <span class="n">replace</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">val</span> <span class="o">=</span> <span class="n">val</span> <span class="o">%</span> <span class="bp">self</span>
<span class="k">return</span> <span class="n">val</span></div>
<div class="viewcode-block" id="Config.set">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.set">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">set</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">val</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Set the value to which ``name`` points in the configuration.</span>
<span class="sd"> If there is no such ``name`` in the config, a :py:obj:`KeyError` is</span>
<span class="sd"> raised.</span>
<span class="sd"> """</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_parent_dict</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">parent</span><span class="p">[</span><span class="n">name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">]]</span> <span class="o">=</span> <span class="n">val</span></div>
<span class="k">def</span><span class="w"> </span><span class="nf">_get_parent_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="n">parent_name</span> <span class="o">=</span> <span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)[:</span><span class="o">-</span><span class="mi">1</span><span class="p">])</span>
<span class="k">if</span> <span class="n">parent_name</span><span class="p">:</span>
<span class="n">parent</span> <span class="o">=</span> <span class="n">value</span><span class="p">(</span><span class="n">parent_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">cfg</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cfg</span>
<span class="k">if</span> <span class="p">(</span><span class="n">parent</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="nb">dict</span><span class="p">)):</span>
<span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="n">parent_name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">parent</span>
<div class="viewcode-block" id="Config.path">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.path">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">UNSET</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Get a :py:class:`pathlib.Path` object from a config string."""</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span>
<span class="k">if</span> <span class="n">val</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">if</span> <span class="n">default</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">default</span>
<span class="k">return</span> <span class="n">pathlib</span><span class="o">.</span><span class="n">Path</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">val</span><span class="p">))</span></div>
<div class="viewcode-block" id="Config.pyobj">
<a class="viewcode-back" href="../../../src/searx.botdetection.html#searx.botdetection.config.Config.pyobj">[docs]</a>
<span class="k">def</span><span class="w"> </span><span class="nf">pyobj</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">UNSET</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Get python object referred by full qualiffied name (FQN) in the config</span>
<span class="sd"> string."""</span>
<span class="n">fqn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fqn</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">if</span> <span class="n">default</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">default</span>
<span class="p">(</span><span class="n">modulename</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">fqn</span><span class="p">)</span><span class="o">.</span><span class="n">rsplit</span><span class="p">(</span><span class="s1">'.'</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">m</span> <span class="o">=</span> <span class="nb">__import__</span><span class="p">(</span><span class="n">modulename</span><span class="p">,</span> <span class="p">{},</span> <span class="p">{},</span> <span class="p">[</span><span class="n">name</span><span class="p">],</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span></div>
</div>
<span class="k">def</span><span class="w"> </span><span class="nf">toml_load</span><span class="p">(</span><span class="n">file_name</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">file_name</span><span class="p">,</span> <span class="s2">"rb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="k">return</span> <span class="n">tomllib</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
<span class="k">except</span> <span class="n">tomllib</span><span class="o">.</span><span class="n">TOMLDecodeError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="n">msg</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">exc</span><span class="p">)</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">'</span><span class="se">\t</span><span class="s1">'</span><span class="p">,</span> <span class="s1">''</span><span class="p">)</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">'</span><span class="se">\n</span><span class="s1">'</span><span class="p">,</span> <span class="s1">' '</span><span class="p">)</span>
<span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"</span><span class="si">%s</span><span class="s2">: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">file_name</span><span class="p">,</span> <span class="n">msg</span><span class="p">)</span>
<span class="k">raise</span>
<span class="c1"># working with dictionaries</span>
<span class="k">def</span><span class="w"> </span><span class="nf">value</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">data_dict</span><span class="p">:</span> <span class="nb">dict</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Returns the value to which ``name`` points in the ``dat_dict``.</span>
<span class="sd"> .. code: python</span>
<span class="sd"> >>> data_dict = {</span>
<span class="sd"> "foo": {"bar": 1 },</span>
<span class="sd"> "bar": {"foo": 2 },</span>
<span class="sd"> "foobar": [1, 2, 3],</span>
<span class="sd"> }</span>
<span class="sd"> >>> value('foobar', data_dict)</span>
<span class="sd"> [1, 2, 3]</span>
<span class="sd"> >>> value('foo.bar', data_dict)</span>
<span class="sd"> 1</span>
<span class="sd"> >>> value('foo.bar.xxx', data_dict)</span>
<span class="sd"> <UNSET></span>
<span class="sd"> """</span>
<span class="n">ret_val</span> <span class="o">=</span> <span class="n">data_dict</span>
<span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ret_val</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="n">ret_val</span> <span class="o">=</span> <span class="n">ret_val</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">part</span><span class="p">,</span> <span class="n">UNSET</span><span class="p">)</span>
<span class="k">if</span> <span class="n">ret_val</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">break</span>
<span class="k">return</span> <span class="n">ret_val</span>
<span class="k">def</span><span class="w"> </span><span class="nf">validate</span><span class="p">(</span>
<span class="n">schema_dict</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">data_dict</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span> <span class="n">deprecated</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span>
<span class="p">)</span> <span class="o">-></span> <span class="n">typing</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">bool</span><span class="p">,</span> <span class="nb">list</span><span class="p">]:</span>
<span class="w"> </span><span class="sd">"""Deep validation of dictionary in ``data_dict`` against dictionary in</span>
<span class="sd"> ``schema_dict``. Argument deprecated is a dictionary that maps deprecated</span>
<span class="sd"> configuration names to a messages::</span>
<span class="sd"> deprecated = {</span>
<span class="sd"> "foo.bar" : "config 'foo.bar' is deprecated, use 'bar.foo'",</span>
<span class="sd"> "..." : "..."</span>
<span class="sd"> }</span>
<span class="sd"> The function returns a python tuple ``(is_valid, issue_list)``:</span>
<span class="sd"> ``is_valid``:</span>
<span class="sd"> A bool value indicating ``data_dict`` is valid or not.</span>
<span class="sd"> ``issue_list``:</span>
<span class="sd"> A list of messages (:py:obj:`SchemaIssue`) from the validation::</span>
<span class="sd"> [schema warn] data_dict: deprecated 'fontlib.foo': <DEPRECATED['foo.bar']></span>
<span class="sd"> [schema invalid] data_dict: key unknown 'fontlib.foo'</span>
<span class="sd"> [schema invalid] data_dict: type mismatch 'fontlib.foo': expected ..., is ...</span>
<span class="sd"> If ``schema_dict`` or ``data_dict`` is not a dictionary type a</span>
<span class="sd"> :py:obj:`SchemaIssue` is raised.</span>
<span class="sd"> """</span>
<span class="n">names</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">is_valid</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">issue_list</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">schema_dict</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">SchemaIssue</span><span class="p">(</span><span class="s1">'invalid'</span><span class="p">,</span> <span class="s2">"schema_dict is not a dict type"</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data_dict</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">SchemaIssue</span><span class="p">(</span><span class="s1">'invalid'</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"data_dict issue</span><span class="si">{</span><span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span><span class="si">}</span><span class="s2"> is not a dict type"</span><span class="p">)</span>
<span class="n">is_valid</span><span class="p">,</span> <span class="n">issue_list</span> <span class="o">=</span> <span class="n">_validate</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">issue_list</span><span class="p">,</span> <span class="n">schema_dict</span><span class="p">,</span> <span class="n">data_dict</span><span class="p">,</span> <span class="n">deprecated</span><span class="p">)</span>
<span class="k">return</span> <span class="n">is_valid</span><span class="p">,</span> <span class="n">issue_list</span>
<span class="k">def</span><span class="w"> </span><span class="nf">_validate</span><span class="p">(</span>
<span class="n">names</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">List</span><span class="p">,</span>
<span class="n">issue_list</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">List</span><span class="p">,</span>
<span class="n">schema_dict</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span>
<span class="n">data_dict</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">,</span>
<span class="n">deprecated</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">],</span>
<span class="p">)</span> <span class="o">-></span> <span class="n">typing</span><span class="o">.</span><span class="n">Tuple</span><span class="p">[</span><span class="nb">bool</span><span class="p">,</span> <span class="n">typing</span><span class="o">.</span><span class="n">List</span><span class="p">]:</span>
<span class="n">is_valid</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">data_value</span> <span class="ow">in</span> <span class="n">data_dict</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">names</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
<span class="n">name</span> <span class="o">=</span> <span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span>
<span class="n">deprecated_msg</span> <span class="o">=</span> <span class="n">deprecated</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="c1"># print("XXX %s: key %s // data_value: %s" % (name, key, data_value))</span>
<span class="k">if</span> <span class="n">deprecated_msg</span><span class="p">:</span>
<span class="n">issue_list</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">SchemaIssue</span><span class="p">(</span><span class="s1">'warn'</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"data_dict '</span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">': deprecated - </span><span class="si">{</span><span class="n">deprecated_msg</span><span class="si">}</span><span class="s2">"</span><span class="p">))</span>
<span class="n">schema_value</span> <span class="o">=</span> <span class="n">value</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">schema_dict</span><span class="p">)</span>
<span class="c1"># print("YYY %s: key %s // schema_value: %s" % (name, key, schema_value))</span>
<span class="k">if</span> <span class="n">schema_value</span> <span class="ow">is</span> <span class="n">UNSET</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">deprecated_msg</span><span class="p">:</span>
<span class="n">issue_list</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">SchemaIssue</span><span class="p">(</span><span class="s1">'invalid'</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"data_dict '</span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">': key unknown in schema_dict"</span><span class="p">))</span>
<span class="n">is_valid</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">elif</span> <span class="nb">type</span><span class="p">(</span><span class="n">schema_value</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">type</span><span class="p">(</span><span class="n">data_value</span><span class="p">):</span> <span class="c1"># pylint: disable=unidiomatic-typecheck</span>
<span class="n">issue_list</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
<span class="n">SchemaIssue</span><span class="p">(</span>
<span class="s1">'invalid'</span><span class="p">,</span>
<span class="p">(</span><span class="sa">f</span><span class="s2">"data_dict: type mismatch '</span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">':"</span> <span class="sa">f</span><span class="s2">" expected </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">schema_value</span><span class="p">)</span><span class="si">}</span><span class="s2">, is: </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">data_value</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span><span class="p">),</span>
<span class="p">)</span>
<span class="p">)</span>
<span class="n">is_valid</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data_value</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="n">_valid</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">_validate</span><span class="p">(</span><span class="n">names</span><span class="p">,</span> <span class="n">issue_list</span><span class="p">,</span> <span class="n">schema_dict</span><span class="p">,</span> <span class="n">data_value</span><span class="p">,</span> <span class="n">deprecated</span><span class="p">)</span>
<span class="n">is_valid</span> <span class="o">=</span> <span class="n">is_valid</span> <span class="ow">and</span> <span class="n">_valid</span>
<span class="n">names</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span>
<span class="k">return</span> <span class="n">is_valid</span><span class="p">,</span> <span class="n">issue_list</span>
<span class="k">def</span><span class="w"> </span><span class="nf">dict_deepupdate</span><span class="p">(</span><span class="n">base_dict</span><span class="p">:</span> <span class="nb">dict</span><span class="p">,</span> <span class="n">upd_dict</span><span class="p">:</span> <span class="nb">dict</span><span class="p">,</span> <span class="n">names</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""Deep-update of dictionary in ``base_dict`` by dictionary in ``upd_dict``.</span>
<span class="sd"> For each ``upd_key`` & ``upd_val`` pair in ``upd_dict``:</span>
<span class="sd"> 0. If types of ``base_dict[upd_key]`` and ``upd_val`` do not match raise a</span>
<span class="sd"> :py:obj:`TypeError`.</span>
<span class="sd"> 1. If ``base_dict[upd_key]`` is a dict: recursively deep-update it by ``upd_val``.</span>
<span class="sd"> 2. If ``base_dict[upd_key]`` not exist: set ``base_dict[upd_key]`` from a</span>
<span class="sd"> (deep-) copy of ``upd_val``.</span>
<span class="sd"> 3. If ``upd_val`` is a list, extend list in ``base_dict[upd_key]`` by the</span>
<span class="sd"> list in ``upd_val``.</span>
<span class="sd"> 4. If ``upd_val`` is a set, update set in ``base_dict[upd_key]`` by set in</span>
<span class="sd"> ``upd_val``.</span>
<span class="sd"> """</span>
<span class="c1"># pylint: disable=too-many-branches</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">base_dict</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"argument 'base_dict' is not a ditionary type"</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">upd_dict</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"argument 'upd_dict' is not a ditionary type"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">names</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">names</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">upd_key</span><span class="p">,</span> <span class="n">upd_val</span> <span class="ow">in</span> <span class="n">upd_dict</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="c1"># For each upd_key & upd_val pair in upd_dict:</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">upd_val</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">if</span> <span class="n">upd_key</span> <span class="ow">in</span> <span class="n">base_dict</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] exists, recursively deep-update it</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">],</span> <span class="nb">dict</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"type mismatch </span><span class="si">{</span><span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span><span class="si">}</span><span class="s2">: is not a dict type in base_dict"</span><span class="p">)</span>
<span class="n">dict_deepupdate</span><span class="p">(</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">],</span>
<span class="n">upd_val</span><span class="p">,</span>
<span class="n">names</span>
<span class="o">+</span> <span class="p">[</span>
<span class="n">upd_key</span><span class="p">,</span>
<span class="p">],</span>
<span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] not exist, set base_dict[upd_key] from deepcopy of upd_val</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="n">upd_val</span><span class="p">)</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">upd_val</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
<span class="k">if</span> <span class="n">upd_key</span> <span class="ow">in</span> <span class="n">base_dict</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] exists, base_dict[up_key] is extended by</span>
<span class="c1"># the list from upd_val</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">],</span> <span class="nb">list</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"type mismatch </span><span class="si">{</span><span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span><span class="si">}</span><span class="s2">: is not a list type in base_dict"</span><span class="p">)</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">upd_val</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] doesn't exists, set base_dict[key] from a deepcopy of the</span>
<span class="c1"># list in upd_val.</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="n">upd_val</span><span class="p">)</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">upd_val</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span>
<span class="k">if</span> <span class="n">upd_key</span> <span class="ow">in</span> <span class="n">base_dict</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] exists, base_dict[up_key] is updated by the set in upd_val</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">],</span> <span class="nb">set</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"type mismatch </span><span class="si">{</span><span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span><span class="si">}</span><span class="s2">: is not a set type in base_dict"</span><span class="p">)</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">upd_val</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># if base_dict[upd_key] doesn't exists, set base_dict[upd_key] from a copy of the</span>
<span class="c1"># set in upd_val</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">upd_val</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># for any other type of upd_val replace or add base_dict[upd_key] by a copy</span>
<span class="c1"># of upd_val</span>
<span class="n">base_dict</span><span class="p">[</span><span class="n">upd_key</span><span class="p">]</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">upd_val</span><span class="p">)</span>
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