Question

I’d like to loop over all directories in a path in Python. So I tried something like the following:

import os, glob, sys

os.chdir('/')
dir_list = glob.glob('*')
for wd in dir_list if os.path.isdir(wd) is True:
    print(wd + " is a directory.")

It seems I have some kind of syntax error. What should I be doing instead of is True? I had thought that os.path.isdir() returns a boolean.

Answer 1

You are mixing generator expressions with a for loop. You can’t do that. Put the if statement on it’s own line:

for wd in dir_list:
    if os.path.isdir(wd):
        print(wd + " is a directory.")

Note that you do not need to test for is True; that’s exactly what the if statement does already.