[cleanup] Upgrade syntax

Using https://github.com/asottile/pyupgrade

1. `__future__` imports and `coding: utf-8` were removed
2. Files were rewritten with `pyupgrade --py36-plus --keep-percent-format`
3. f-strings were cherry-picked from `pyupgrade --py36-plus`

Extractors are left untouched (except removing header) to avoid unnecessary merge conflicts

yt_dlp/extractor/abc.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import hashlib
 import hmac
 import re

yt_dlp/extractor/abcnews.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .amp import AMPIE
 from .common import InfoExtractor
 from ..utils import (

yt_dlp/extractor/abcotvs.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (

yt_dlp/extractor/academicearth.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/acast.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import (
     clean_html,

yt_dlp/extractor/adn.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import base64
 import binascii
 import json

yt_dlp/extractor/adobeconnect.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..compat import (
     compat_parse_qs,

yt_dlp/extractor/adobepass.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 import re
 import time

yt_dlp/extractor/adobetv.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import functools
 import re
 

yt_dlp/extractor/adultswim.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .turner import TurnerBaseIE

yt_dlp/extractor/aenetworks.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .theplatform import ThePlatformIE
 from ..utils import (
     ExtractorError,

yt_dlp/extractor/afreecatv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import functools
 import re
 

yt_dlp/extractor/airmozilla.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/aliexpress.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (

yt_dlp/extractor/aljazeera.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/allocine.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (

yt_dlp/extractor/alphaporno.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     parse_iso8601,

yt_dlp/extractor/alsace20tv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     clean_html,

yt_dlp/extractor/alura.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/amara.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from .youtube import YoutubeIE
 from .vimeo import VimeoIE

yt_dlp/extractor/amazon.py

@@ -1,4 +1,3 @@
-# coding: utf-8
 from .common import InfoExtractor
 from ..utils import int_or_none
 

yt_dlp/extractor/amcnetworks.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .theplatform import ThePlatformIE

yt_dlp/extractor/americastestkitchen.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/amp.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     determine_ext,

yt_dlp/extractor/animelab.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 from ..utils import (

yt_dlp/extractor/animeondemand.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/ant1newsgr.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 import urllib.parse
 

yt_dlp/extractor/anvato.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import base64
 import hashlib
 import json

yt_dlp/extractor/anvato_token_generator/__init__.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .nfl import NFLTokenGenerator
 
 __all__ = [

yt_dlp/extractor/anvato_token_generator/common.py

@@ -1,6 +1,3 @@
-from __future__ import unicode_literals
-
-
 class TokenGenerator:
     def generate(self, anvack, mcp_id):
         raise NotImplementedError('This method must be implemented by subclasses')

yt_dlp/extractor/anvato_token_generator/nfl.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import json
 
 from .common import TokenGenerator

yt_dlp/extractor/aol.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .yahoo import YahooIE

yt_dlp/extractor/apa.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/aparat.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     get_element_by_id,

yt_dlp/extractor/appleconnect.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     str_to_int,

yt_dlp/extractor/applepodcasts.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     clean_html,

yt_dlp/extractor/appletrailers.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import re
 import json
 

yt_dlp/extractor/archiveorg.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 import json
 from .common import InfoExtractor
@@ -479,7 +476,7 @@ class YoutubeWebArchiveIE(InfoExtractor):
 
     def _extract_yt_initial_variable(self, webpage, regex, video_id, name):
         return self._parse_json(self._search_regex(
-            (r'%s\s*%s' % (regex, self._YT_INITIAL_BOUNDARY_RE),
+            (fr'{regex}\s*{self._YT_INITIAL_BOUNDARY_RE}',
              regex), webpage, name, default='{}'), video_id, fatal=False)
 
     def _extract_webpage_title(self, webpage):
@@ -597,7 +594,7 @@ class YoutubeWebArchiveIE(InfoExtractor):
         response = self._call_cdx_api(
             video_id, f'https://www.youtube.com/watch?v={video_id}',
             filters=['mimetype:text/html'], collapse=['timestamp:6', 'digest'], query={'matchType': 'prefix'}) or []
-        all_captures = sorted([int_or_none(r['timestamp']) for r in response if int_or_none(r['timestamp']) is not None])
+        all_captures = sorted(int_or_none(r['timestamp']) for r in response if int_or_none(r['timestamp']) is not None)
 
         # Prefer the new polymer UI captures as we support extracting more metadata from them
         # WBM captures seem to all switch to this layout ~July 2020

yt_dlp/extractor/arcpublishing.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/ard.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 import re
 

yt_dlp/extractor/arkena.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/arnes.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..compat import (
     compat_parse_qs,

yt_dlp/extractor/arte.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/asiancrush.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import functools
 import re
 

yt_dlp/extractor/atresplayer.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..compat import compat_HTTPError
 from ..utils import (

yt_dlp/extractor/atttechchannel.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import unified_strdate
 

yt_dlp/extractor/atvat.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import datetime
 
 from .common import InfoExtractor

yt_dlp/extractor/audimedia.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     int_or_none,

yt_dlp/extractor/audioboom.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     clean_html,

yt_dlp/extractor/audiomack.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import itertools
 import time
 

yt_dlp/extractor/audius.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import random
 
 from .common import InfoExtractor

yt_dlp/extractor/awaan.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import base64
 
 from .common import InfoExtractor

yt_dlp/extractor/aws.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import datetime
 import hashlib
 import hmac

yt_dlp/extractor/azmedien.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/baidu.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import unescapeHTML
 

yt_dlp/extractor/banbye.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import math
 
 from .common import InfoExtractor

yt_dlp/extractor/bandaichannel.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .brightcove import BrightcoveNewIE
 from ..utils import extract_attributes
 

yt_dlp/extractor/bandcamp.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import random
 import re
 import time

yt_dlp/extractor/bannedvideo.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/bbc.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import xml.etree.ElementTree
 import functools
 import itertools

yt_dlp/extractor/beatport.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/beeg.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 from ..utils import (

yt_dlp/extractor/behindkink.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import url_basename
 

yt_dlp/extractor/bellmedia.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/bet.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .mtv import MTVServicesInfoExtractor
 from ..utils import unified_strdate
 

yt_dlp/extractor/bfi.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/bfmtv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/bibeltv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/bigflix.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/bigo.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import ExtractorError, urlencode_postdata
 

yt_dlp/extractor/bild.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     int_or_none,

yt_dlp/extractor/bilibili.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 import base64
 import hashlib
 import itertools

yt_dlp/extractor/biobiochiletv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from ..utils import (
     ExtractorError,

yt_dlp/extractor/biqle.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from .vk import VKIE
 from ..compat import compat_b64decode

yt_dlp/extractor/bitchute.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import itertools
 import re
 

yt_dlp/extractor/bitwave.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/blackboardcollaborate.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import parse_iso8601
 

yt_dlp/extractor/bleacherreport.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from .amp import AMPIE
 from ..utils import (

yt_dlp/extractor/blinkx.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/blogger.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from ..utils import (

yt_dlp/extractor/bloomberg.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/bokecc.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..compat import compat_parse_qs
 from ..utils import ExtractorError

yt_dlp/extractor/bongacams.py

@@ -1,6 +1,3 @@
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..compat import compat_str
 from ..utils import (

yt_dlp/extractor/bostonglobe.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/box.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/bpb.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor

yt_dlp/extractor/br.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 
 from .common import InfoExtractor

yt_dlp/extractor/bravotv.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .adobepass import AdobePassIE

yt_dlp/extractor/breakcom.py

@@ -1,6 +1,3 @@
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from .youtube import YoutubeIE
 from ..utils import (

yt_dlp/extractor/breitbart.py

@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/brightcove.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import base64
 import re
 import struct

yt_dlp/extractor/businessinsider.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 from .jwplatform import JWPlatformIE
 

yt_dlp/extractor/buzzfeed.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import json
 import re
 

yt_dlp/extractor/byutv.py

@@ -1,6 +1,3 @@
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import (
     determine_ext,

yt_dlp/extractor/c56.py

@@ -1,7 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
 from .common import InfoExtractor
 from ..utils import js_to_json
 

yt_dlp/extractor/cableav.py

@@ -1,4 +1,3 @@
-# coding: utf-8
 from .common import InfoExtractor
 
 

yt_dlp/extractor/callin.py

@@ -1,4 +1,3 @@
-# coding: utf-8
 from .common import InfoExtractor
 from ..utils import (
     traverse_obj,

yt_dlp/extractor/caltrans.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/cam4.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 from .common import InfoExtractor
 
 

yt_dlp/extractor/camdemy.py

@@ -1,6 +1,3 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import re
 
 from .common import InfoExtractor