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mimetypes.guess_extension : AttributeError: 'NoneType' object has no attribute 'lower' #96264

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@HGStyle

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@HGStyle

Hi, when i call the function "guess_extension" from the mimetypes module, i get an error :

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/hg/Bureau/ezConverter/module.py", line 14, in getRealExtension
    currentext = mime.guess_extension(x[0])
  File "/usr/lib/python3.9/mimetypes.py", line 326, in guess_extension
    return _db.guess_extension(type, strict)
  File "/usr/lib/python3.9/mimetypes.py", line 192, in guess_extension
    extensions = self.guess_all_extensions(type, strict)
  File "/usr/lib/python3.9/mimetypes.py", line 171, in guess_all_extensions
    type = type.lower()
AttributeError: 'NoneType' object has no attribute 'lower'

I dont think it's my code. But it is here :

import mimetypes as mime
def getRealExtension(filename):
    x = mime.guess_type(filename)
    currentext = mime.guess_extension(x[0])
# I import it to the shell and call the function.

Thanks in advance !

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