pytube: AttributeError: 'NoneType' object has no attribute 'span'

Question

I just downloaded pytube (version 11.0.1) and started with this code snippet from here:

from pytube import YouTube
YouTube('https://youtu.be/9bZkp7q19f0').streams.first().download()

which gives this error:

AttributeError                            Traceback (most recent call last)
<ipython-input-29-0bfa08b87614> in <module>
----> 1 YouTube('https://youtu.be/9bZkp7q19f0').streams.first().download()

~/anaconda3/lib/python3.8/site-packages/pytube/__main__.py in streams(self)
    290         """
    291         self.check_availability()
--> 292         return StreamQuery(self.fmt_streams)
    293 
    294     @property

~/anaconda3/lib/python3.8/site-packages/pytube/__main__.py in fmt_streams(self)
    175         # https://github.com/pytube/pytube/issues/1054
    176         try:
--> 177             extract.apply_signature(stream_manifest, self.vid_info, self.js)                                                                            
    178         except exceptions.ExtractError:
    179             # To force an update to the js file, we clear the cache and retry                                                                           

~/anaconda3/lib/python3.8/site-packages/pytube/extract.py in apply_signature(stream_manifest, vid_info, js)                                                     
    407 
    408     """
--> 409     cipher = Cipher(js=js)
    410 
    411     for i, stream in enumerate(stream_manifest):

~/anaconda3/lib/python3.8/site-packages/pytube/cipher.py in __init__(self, js)
     42 
     43         self.throttling_plan = get_throttling_plan(js)
---> 44         self.throttling_array = get_throttling_function_array(js)
     45 
     46         self.calculated_n = None

~/anaconda3/lib/python3.8/site-packages/pytube/cipher.py in get_throttling_function_array(js)                                                                   
    321 
    322     array_raw = find_object_from_startpoint(raw_code, match.span()[1] - 1)                                                                              
--> 323     str_array = throttling_array_split(array_raw)
    324 
    325     converted_array = []

~/anaconda3/lib/python3.8/site-packages/pytube/parser.py in throttling_array_split(js_array)                                                                    
    156             # Handle functions separately. These can contain commas
    157             match = func_regex.search(curr_substring)
--> 158             match_start, match_end = match.span()
    159 
    160             function_text = find_object_from_startpoint(curr_substring, match.span()[1])

AttributeError: 'NoneType' object has no attribute 'span'

and I wonder why? Can anyone help me? I am running this snippet in an ipython console (IPython version 7.22.0) with Python 3.8.8 in a conda environment.

Answer 1

Found this issue, pytube v11.0.1. It's a little late for me, but if no one has submitted a fix tomorrow I'll check it out.

in C:\Python38\lib\site-packages\pytube\parser.py

Change this line:

152: func_regex = re.compile(r"function\([^)]+\)")

to this:

152: func_regex = re.compile(r"function\([^)]?\)")

The issue is that the regex expects a function with an argument, but I guess youtube added some src that includes non-paramterized functions.