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Python Python for File Systems Manipulation Consistency

Posted by John Davis
John Davis
16,469 Points

Not quite sure why the File Not Found Error

I'm not sure what I am doing wrong here. I took the approach to rebuild from an empty string. I think my os module stuff is right - but not completely sure.

Any help would be appreciated.

consistency.py 
import os

# Filenames consist of a username (alphanumeric, 3-12 characters)
# and a date (four digit year, two digit month, two digit day),
# and an extension. They should end up in the format
# year-month-day-username.extension.

# Example: kennethlove2-2012-04-29.txt becomes 2012-04-29-kennethlove2.txt

def cleanup(path):
    # your code here
    files = os.listdir(path)
    for file in files:
        new_name = ""
        tmp = file.split("-")
        # print(tmp)
        ext = tmp[-1].split(".")
        # print(ext)
        new_name += tmp[1] + "-" + tmp[2] + "-" + ext[0] + "-" + tmp[0] + "." + ext[1]
        # print(new_name)
        os.renames(file, new_name)

2 Answers

John Davis
John Davis
16,469 Points
John Davis
John Davis
16,469 Points

Ok, I figured it out.

Last line of my function should have been this:

os.renames(os.path.join(path, file), os.path.join(path, new_name))

Once I made that adjustment - the tests passed.

justlevy
justlevy
6,325 Points
justlevy
justlevy
6,325 Points

I'm adding to this thread because my code is somewhat similar and it's not passing the challenge. Any ideas ( Chris Freeman - Python master)? I'm puzzled since this code works for me locally (Visual Studio Code, Windows).

John Davis - I like how you combined os.path.join in os.renames. 

import os
import re
# Filenames consist of a username (alphanumeric, 3-12 characters)
# and a date (four digit year, two digit month, two digit day),
# and an extension. They should end up in the format
# year-month-day-username.extension.

# Example: kennethlove2-2012-04-29.txt becomes 2012-04-29-kennethlove2.txt

def cleanup(path):
    dirs = os.listdir(path)
    for files in dirs:
        username, yyyy, mm, dd, ext = re.split('\.|-', files)
        new_files = yyyy + '-' + mm + '-' + dd + '-' + username + '.' + ext
        old_paths = os.path.join(path, files)
        new_paths = os.path.join(path, new_files)
        os.rename(old_paths, new_paths)


    # change original filename to preferred filename (regex, split ?)
    # rename files (os.renames?) 


cleanup('consistency')
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Hey justlevy, your code passes for me if I remove last line. the call to cleanup

justlevy
justlevy
6,325 Points
justlevy
justlevy
6,325 Points

Thank you Chris Freeman.

For some reason, I assumed we had to call the function.