Recursively searching for files with specific extensions in a directory
Matthew Barrera 
For some reason this returns me an empty list, and I have no idea why.
import os, fnmatch
vidext = ['.avi', '.mkv', '.wmv', '.mp4', '.mpg', '.mpeg', '.mov', '.m4v']
def findExt(folder): matches = [] for root, dirnames, filenames in os.walk(folder): for extension in vidext: for filename in fnmatch.filter(filenames, extension): matches.append(os.path.join(root, filename)) return matches
print(findExt("D:\TVRip"))1 Answer
You'd need to add a wildcard to each extension for fnmatch.filter() to match:
fnmatch.filter(filenames, '*' + extension)but there is no need to use fnmatch here at all. Just use str.endswith():
for root, dirnames, filenames in os.walk(folder): for filename in filenames: if filename.endswith(extensions): matches.append(os.path.join(root, filename))or expressed as a list comprehension:
return [os.path.join(r, fn) for r, ds, fs in os.walk(folder) for fn in fs if fn.endswith(extensions)]
