问Pytube库-尝试访问视频数据时收到"pytube.exceptions.RegexMatchError: regex pattern“错误

EN

pip install git+https://github.com/nficano/pytube.git

#####################################################

import sys
import pytube

link = input('Enter url: ') # url is: https://www.youtube.com/watch?v=KSbjcFtFPA
yt = pytube.YouTube(link)
print(yt.title)

**OUTPUT** Sanford and Son S02E02

sys.exit()

- Video 1 in the list will throw an extraction error. because the video has been removed from YouTube

- Video 2 in the list will throw an unavailable error. because the video does not exist on YouTube

- Video 3 in the list will display the correct title info, because the video exists on YouTube.

video_lists = ['https://www.youtube.com/watch?v=KSbjcFtFPA',
           'https://www.youtube.com/watch?v=MEEJOZkmIxvU',
           'https://www.youtube.com/watch?v=MEEJOZkmIxU'
           ]

for video in video_lists:

  try:
    yt = pytube.YouTube(video)
    print (yt.title)

  #################################################################
  # This one should catch - pytube.exceptions.RegexMatchError:
  # regex pattern ((?:v=|\/)([0-9A-Za-z_-]{11}).*) had zero matches
  #################################################################
  except pytube.exceptions.RegexMatchError:
    print('The Regex pattern did not return any matches for the video: {}'.format(video))

  except pytube.exceptions.ExtractError:
    print ('An extraction error occurred for the video: {}'.format(video))

  except pytube.exceptions.VideoUnavailable:
    print('The following video is unavailable: {}'.format(video))

**OUTPUTS**
An extraction occurred for the video: https://www.youtube.com/watch?v=KSbjcFtFPA

The following video is unavailable: https://www.youtube.com/watch?v=MEEJOZkmIxvU

Love of my life & Bohemian Rhapsody - 1080 HD

def get_initial_function_name(js):
"""Extract the name of the function responsible for computing the signature.

:param str js:
    The contents of the base.js asset file.

"""
# c&&d.set("signature", EE(c));
pattern = r'\bc\s*&&\s*d\.set\([^,]+\s*,\s*\([^)]*\)\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\('
logger.debug('finding initial function name')
return regex_search(pattern, js, group=1)