Python：如何重命名文件夹中的文件？

Question

I have a list of file like the following

'TRIAL_20134_75690_TOTAL_2018-08-12-17-18.csv'

I want to rename them the parte after the last underscore, such as the file will be renamed like:

'TRIAL_20134_75690_TOTAL.csv'

Answer 1

Use os.rename from the os library to do the renaming.

To get the sting up to the last index of an underscore ( _ ), use the rindex method of string .

You also need to concatenate the extension back on.

Ie

import os
f = 'TRIAL_20134_75690_TOTAL_2018-08-12-17-18.csv'
os.rename(f, f[:f.rindex('_'] + '.csv')