Question

I need to pass an extension to function, and then have that function pull all files with that extension in both lower and uppercase form.

For example, if I passed mov, I need to function to do:

videos = [file for file in glob.glob(os.path.join(dir, '*.[mM][oO][vV]'))] 

How would I accomplish the lower + upper combination above given a lowercase input?

Answer 1

Something like this?

>>> def foo(extension):
...     return '*.' + ''.join('[%s%s]' % (e.lower(), e.upper()) for e in extension)
... 
>>> foo('mov')
'*.[mM][oO][vV]'