CODEWITHSUNDEEP
python
muad-dweeb
muad-dweeb

Reputation: 1135

Flag subdirectories that are missing a particular file

In the directory structure:

"~/clients/images/"

where clients contains almost 1000 images subdirectories, I need to discover which of these subdirectories are missing the file master.jpg. I've tried unsuccessfully to print the desired output to the console, and I have tried writing it to a .txt file. 

import os

path = os.path.expanduser('~/clients/images/')
mast  = '/master.jpg'

print '\nFinding missing masters...n'

for dirpath, dirnames, filenames in os.walk(path):
    for filename in filenames:
        recipe = os.path.join(dirpath, filename)
        if "master.jpg" not in filenames:
            print str(dirnames), '\n'

What this currently does is to seemingly print a ton of empty lists ("[]") and newlines, which is definitely not what I want (all I want to know is which subdirectories are missing 'master.jpg'.)

Upvotes: 0

Views: 30

Answers (1)

rchang
rchang

Reputation: 5236

Try this:

for dirpath, dirnames, filenames in os.walk(path):
  if "master.jpg" not in filenames:  print dirpath

For each 3-element object generated by the os.walk generator, the first element (dirpath in your code) represents the directory being examined. The third element (filenames in your code) is a list containing all files found in that directory, so checking for the absence of master.jpg in filenames is the right thing to do.

I'm assuming that master.jpg will always be a file - if there is the possibility that there could be a subdirectory named master.jpg (seems odd, but the requirements are yours and not mine), then you might have to do:

for dirpath, dirnames, filenames in os.walk(path):
  if "master.jpg" not in filenames and "master.jpg" not in dirnames:  print dirpath

Upvotes: 1

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