[pylint] webapp.py - fix all wrong-import-order messages from pylint

pylint message: wrong-import-order
  Respect PEP8 import order (standard imports first, then third-party libraries,
  then local imports).

pylint message: wrong-import-position
  Do not mix code & imports

BTW:

- only one import per line
- replace licence text by SPDX tag

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/webapp.py

@@ -1,99 +1,138 @@
 #!/usr/bin/env python
-
-'''
-searx is free software: you can redistribute it and/or modify
-it under the terms of the GNU Affero General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-searx is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU Affero General Public License for more details.
-
-You should have received a copy of the GNU Affero General Public License
-along with searx. If not, see < http://www.gnu.org/licenses/ >.
-
-(C) 2013- by Adam Tauber, <asciimoo@gmail.com>
-'''
-
-import sys
-if sys.version_info[0] < 3:
-    print('\033[1;31m Python2 is no longer supported\033[0m')
-    exit(1)
-
-# set Unix thread name
-try:
-    import setproctitle
-except ImportError:
-    pass
-else:
-    import threading
-    old_thread_init = threading.Thread.__init__
-
-    def new_thread_init(self, *args, **kwargs):
-        old_thread_init(self, *args, **kwargs)
-        setproctitle.setthreadtitle(self._name)
-    threading.Thread.__init__ = new_thread_init
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+# pylint: disable=missing-function-docstring
 
 import hashlib
 import hmac
 import json
 import os
-
-import httpx
-
-from searx import logger
-logger = logger.getChild('webapp')
+import sys
 
 from datetime import datetime, timedelta
 from timeit import default_timer
 from html import escape
 from io import StringIO
+
 import urllib
-from urllib.parse import urlencode, urlparse
+from urllib.parse import (
+    urlencode,
+    urlparse,
+)
+
+import httpx
 
 from pygments import highlight
 from pygments.lexers import get_lexer_by_name
 from pygments.formatters import HtmlFormatter  # pylint: disable=no-name-in-module
 
 from werkzeug.middleware.proxy_fix import ProxyFix
+from werkzeug.serving import WSGIRequestHandler
+
 from flask import (
-    Flask, request, render_template, url_for, Response, make_response,
-    redirect, send_from_directory
+    Flask,
+    request,
+    render_template,
+    url_for,
+    Response,
+    make_response,
+    redirect,
+    send_from_directory,
 )
-from babel.support import Translations
-import flask_babel
-from flask_babel import Babel, gettext, format_date, format_decimal
 from flask.ctx import has_request_context
 from flask.json import jsonify
+
+from babel.support import Translations
+import flask_babel
+from flask_babel import (
+    Babel,
+    gettext,
+    format_date,
+    format_decimal,
+)
+
+from searx import logger
 from searx import brand, static_path
-from searx import settings, searx_dir, searx_debug
+from searx import (
+    settings,
+    searx_dir,
+    searx_debug,
+)
 from searx.exceptions import SearxParameterException
-from searx.engines import categories, engines, engine_shortcuts
+from searx.engines import (
+    categories,
+    engines,
+    engine_shortcuts,
+)
 from searx.webutils import (
-    UnicodeWriter, highlight_content, get_resources_directory,
-    get_static_files, get_result_templates, get_themes,
-    prettify_url, new_hmac, is_flask_run_cmdline
+    UnicodeWriter,
+    highlight_content,
+    get_resources_directory,
+    get_static_files,
+    get_result_templates,
+    get_themes,
+    prettify_url,
+    new_hmac,
+    is_flask_run_cmdline,
+)
+from searx.webadapter import (
+    get_search_query_from_webapp,
+    get_selected_categories,
+)
+from searx.utils import (
+    html_to_text,
+    gen_useragent,
+    dict_subset,
+    match_language,
 )
-from searx.webadapter import get_search_query_from_webapp, get_selected_categories
-from searx.utils import html_to_text, gen_useragent, dict_subset, match_language
 from searx.version import VERSION_STRING
-from searx.languages import language_codes as languages
-from searx.search import SearchWithPlugins, initialize as search_initialize
-from searx.search.checker import get_result as checker_get_result
 from searx.query import RawTextQuery
-from searx.autocomplete import search_autocomplete, backends as autocomplete_backends
 from searx.plugins import plugins
 from searx.plugins.oa_doi_rewrite import get_doi_resolver
-from searx.preferences import Preferences, ValidationException, LANGUAGE_CODES
+from searx.preferences import (
+    Preferences,
+    ValidationException,
+    LANGUAGE_CODES,
+)
 from searx.answerers import answerers
-from searx.network import stream as http_stream
 from searx.answerers import ask
-from searx.metrics import get_engines_stats, get_engine_errors, get_reliabilities, histogram, counter
+from searx.metrics import (
+    get_engines_stats,
+    get_engine_errors,
+    get_reliabilities,
+    histogram,
+    counter,
+)
+
+# renaming names from searx imports ...
+
+from searx.autocomplete import search_autocomplete, backends as autocomplete_backends
+from searx.languages import language_codes as languages
+from searx.search import SearchWithPlugins, initialize as search_initialize
+from searx.network import stream as http_stream
+from searx.search.checker import get_result as checker_get_result
+
+# set Unix thread name
+try:
+    import setproctitle
+except ImportError:
+    pass
+else:
+    import threading
+    old_thread_init = threading.Thread.__init__
+
+    def new_thread_init(self, *args, **kwargs):
+        old_thread_init(self, *args, **kwargs)
+        setproctitle.setthreadtitle(self._name)
+    threading.Thread.__init__ = new_thread_init
+
+if sys.version_info[0] < 3:
+    print('\033[1;31m Python2 is no longer supported\033[0m')
+    exit(1)
+
+logger = logger.getChild('webapp')
 
 # serve pages with HTTP/1.1
-from werkzeug.serving import WSGIRequestHandler
 WSGIRequestHandler.protocol_version = "HTTP/{}".format(settings['server'].get('http_protocol_version', '1.0'))
 
 # check secret_key