CODEWITHSUNDEEP
python
Gl0rph
Gl0rph

Reputation: 103

Python- Replace all spaces with underscores and convert to lowercase for all files in a directory

I am trying to do as the title explains, but am given the message WinError2: cannot find the file specified 'New Text Document.txt' -> 'new_text_document.txt' with the code snippet below. Yes, my Desktop is on drive letter D, and this assumes the target directory is named 'directory'. I have a sample file in the directory named 'New Text Document.txt'. I just can't figure out where the problem is.

import os
path = 'D:\Desktop\directory'
filenames = os.listdir(path)
for filename in filenames:
    os.rename(filename, filename.replace(' ', '_').lower())

Upvotes: 10

Views: 15626

Answers (4)

lsalamon
lsalamon

Reputation: 858

use the full file naming for safer os operations:

import os
path = 'D:\\test'
for filename in os.listdir(path):
    #print(filename)
    os.rename(os.path.join(path,filename),os.path.join(path, filename.replace(' ', '_').lower()))

Upvotes: 8

Sean McCarthy
Sean McCarthy

Reputation: 5568

Alternative method using os.walk(directory) if you want to do this recursively through several levels of folders:

import os

directory = r'D:\Desktop\directory'

# Use underscore? Otherwise defaults to hyphen
is_use_underscore = True
char_to_use = '_' if is_use_underscore else '-'   

print("Renaming files now!")
for root, dirs, files in os.walk(directory):
    print(f"root: {root}")
    print(f"dirs: {dirs}")
    print(f"files: {files}")

    for current_filename in files:
        new_filename = current_filename.replace(' ', char_to_use)

        print(f"current filename: {current_filename}")
        print(f"    new filename: {new_filename}")

        os.rename(
            os.path.join(root, current_filename), 
            os.path.join(root, new_filename)
        )   

print("All done!")

Upvotes: 2

chickity china chinese chicken
chickity china chinese chicken

Reputation: 8047

A one-liner using list comprehension:

import os

directory = 'D:\Desktop\directory'

[os.rename(os.path.join(directory, f), os.path.join(directory, f).replace(' ', '_').lower()) for f in os.listdir(directory)]

list-comprehension borrowed from answer Batch Renaming of Files in a Directory

Upvotes: 13

A.Sherif
A.Sherif

Reputation: 144

Because you did not specify the directory where the New Text Document.txt is for the os.rename function. You can just add this line before the for loop.

os.chdir(path)

And either use raw strings or full file paths, because the way you defined path will also give you an error.

path = r'D:\Desktop\directory' or path = 'D:\\Desktop\\directory'

Upvotes: 0

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