RegexMatchError: get_throttling_function_name: could not find match for multiple

[JuanRoccia]

Before creating an issue

I have confirmed that I am on the latest version of pytube by installing from the source. I did this by running !pip install git+https://github.com/pytube/pytube.

Describe the bug

I'm encountering a RegexMatchError when trying to download a YouTube video using pytube. The error message suggests that the function get_throttling_function_name could not find a match for multiple.

To Reproduce

The video URL that is causing the error is https://www.youtube.com/watch?v=Xg9ihH15Uto&ab_channel=Fireship.

Here is the code where the problem is occurring:

from pytube import YouTube

def Download(link):
    youtubeObject = YouTube(link)
    youtubeObject = youtubeObject.streams.get_highest_resolution()
    try:
        youtubeObject.download()
    except:
        print("An error has occurred")
    print("Download is completed successfully")

link = 'https://www.youtube.com/watch?v=Xg9ihH15Uto&ab_channel=Fireship'
Download(link)

Expected behavior

I expected the video to be downloaded without any errors.

Output

Here is the full traceback for the exception:

RegexMatchError: get_throttling_function_name: could not find match for multiple

System information

• Python version: 3.10.12
• Pytube version: 15.0.0
• Command used to install pytube: !pip install --upgrade pytube

[github-actions]

Thank you for contributing to PyTube. Please remember to reference Contributing.md

[danilofcosta]

tbm estou enfretando o mesmo problema
na linha
yt.streams.filter(only_audio=True,abr='128kbps').first()

acontece o mesmo problema relatado acima e tem esse resultado no prompt

RegexMatchError: get_throttling_function_name: could not find match for multiple

During handling of the above exception, another exception occurred:

RegexMatchError                           Traceback (most recent call last)
[/usr/local/lib/python3.10/dist-packages/pytube/cipher.py](https://localhost:8080/#) in get_throttling_function_name(js)
    294                     return array[int(idx)]
    295 
--> 296     raise RegexMatchError(
    297         caller="get_throttling_function_name", pattern="multiple"
    298     )

RegexMatchError: get_throttling_function_name: could not find match for multiple)

Contributing.md
JuanRoccia

[HarshitKmr10]

Even when using !pytube https://youtube.com/watch?v=2lAe1cqCOXo for the youtube video on python 3.10 results in the same error. Is there any workaround for the same version ?

[schnow265]

I guess that it has to do with something on YouTube's end. I'm getting the same Error.

[XLG123]

I've been getting the same error for the past two days. I tried searching up for solutions, and tried some of them, however none of them worked.

[efeakaroz13]

My Spotify MP3 downloader script stopped working because of this.

[srccircumflex]

solved

fix the problem by removing the ; from the pattern in line 287 of pytube.cipher

[TerminaAS]

It's no use changing r'var {nfunc}\s*=\s*(\[.+?\]);'.format( the problem still exist

[srccircumflex]

Changing line 287 of pytube.cipher to exactly 'var {nfunc}\\s*=\\s*(\\[.+?])'.format( works fine for me.
Perhaps the java scripts differ depending on the region.

[Highfish93]

erasing the ; helped me too
thanks a lot @srccircumflex

[yaitskeshav]

erasing the ; helped me too
thanks a lot @srccircumflex

[efeakaroz13]

@srccircumflex Appreciate it !

[Iyas01]

Testing the download() if is not None and removing the ";" solved it for me. Thanks @srccircumflex.

Sample code from binarysmurf with applied fixes.

from pytube import YouTube
path = "/Users/user_name" # substitute to where you want to place the downloaded file

def YTDownload(link):
    youTubeObject = YouTube(link)
    youTubeObject = youTubeObject.streams.get_highest_resolution()
    try:
        if youTubeObject is not None:
            youTubeObject.download(path)
    except:
        print("There has been an error.")
    
    print("All good.")
    
link = input("What video URL? ")
YTDownload(link)

Source:
https://www.reddit.com/r/learnpython/comments/zn014o/why_is_the_download_method_flagged_as_an_error/?onboarding_redirect=%2Fr%2Flearnpython%2Fcomments%2Fzn014o%2Fwhy_is_the_download_method_flagged_as_an_error%2F

[Realalirezayazdanpanah]

removing the ; inside the regex pattern in line 287 of file "pytube.cipher" totally fixed this!
Thanks to @srccircumflex

[Armag67]

@srccircumflex
Your trick works even on Python 3.11

[raghunathsmusings]

solved

fix the problem by removing the ; from the pattern in line 287 of pytube.cipher

Thank you very much @srccircumflex. Removing ; solved the problem !

[Leonardo-DevStrom]

I'm going to make a video teaching how to make the correction, go to this channel https://www.youtube.com/channel/UCZLD0izYZI-zB20Uuof9u0w and the video will be out soon.

[DiegoMP-235]

Me funciono quitando ";" en la línea 287 del archivo "cipher.py"
I have removed the ";" in the line 287 of "cipher.py" and It works

[aleksejalex]

Hi everyone, I had the same error and erasing the semicolon in the line 287 of "cipher.py" also worked for me (thanks #1707 (comment) ).

Please update PyTube so everyone can use my project with unchanged version of pytube.

[klebersondrl]

Erasing the semicolon in line 287 helped me too.
Thanks a lot @srccircumflex!

[allenthomas01]

Erased the semicolon on line 287 of 'cipher.py' and it got fixed. thank you so much @srccircumflex 🌟

[AkshayShineKrishna]

Erasing the semicolon in line 287 helped me too.⚡
Thanks a lot @srccircumflex

[khoul911]

if erasing the semicolon on line 287 does not work you can change the lines 272 and 273 to:

r'a.[a-zA-Z]\s*&&\s*([a-z]\s*=\sa.get("n"))\s&&.?||\s([a-z]+)',
r'([a-z]\s*=\s*([a-zA-Z0-9$]+)([\d+])?([a-z])', ]

[YuriiMaiboroda]

In the second repexp, the square brackets must be mandatory. Need to remove the question mark after the group with them.

r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&.*?\|\|\s*([a-z]+)',
r'\([a-z]\s*=\s*([a-zA-Z0-9$]+)(\[\d+\])\([a-z]\)',

[Bikatr7]

To Fix:

Change in Cipher.py

Line 272 & 273 to :

r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&.*?\|\|\s*([a-z]+)',
r'\([a-z]\s*=\s*([a-zA-Z0-9$]+)(\[\d+\])\([a-z]\)',

And remove the ';' from Line 287.