How to count the number of files in a directory using Python

问题

I need to count the number of files in a directory using Python.

I guess the easiest way is len(glob.glob('*')), but that also counts the directory itself as a file.

Is there any way to count only the files in a directory?

回答1:

os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():

import os, os.path

# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name)])

# path joining version for other paths
DIR = '/tmp'
print len([name for name in os.listdir(DIR) if os.path.isfile(os.path.join(DIR, name))])

回答2:

import os

path, dirs, files = next(os.walk("/usr/lib"))
file_count = len(files)

来源：https://stackoverflow.com/questions/2632205/how-to-count-the-number-of-files-in-a-directory-using-python