Python-向文件编号添加前导 0

Question

我是 python 和编程新手，通常我的文件夹中有 1200 个文本文件，格式如下：
James - 1 - How to... .txt
Sarah - 2 - How to... .txt
Steph - 3 - How to ... .txt
...
玛丽亚 - 200 - 如何... .txt
...
拉什福德 - 1200 - 如何... .txt

我想重命名 1000 以下的文件以添加前导 0，以便它们都具有相同的位数，例如 0001、0050、0300

到目前为止，这是我的代码，但我卡住了：

#!python3

import os
from tkinter import filedialog

cleaned_files = []

root_folder = filedialog.askdirectory()
os.chdir(root_folder)
folder_files = os.listdir(root_folder)

# Filter out files starting with '.' and '_'
cleaned_files = []
for item in folder_files:
    if item[0] == '.' or item[0] == '_':
        pass
    else:
        cleaned_files.append(item)


# Find file names of the root folder and save them


def getFiles(files):
    for file in files:
        file_start, file_number, file_end = file.split('-')
        file_number.strip()

        # Was trying to append just one 0 to numbers <10
        if int(file_number) < 10:
            print(file_number)
        else:
            pass
getFiles(cleaned_files)

Answer 1

正如您在评论中所说，str.zfill这是一种可能且简单的解决方案。

你只需要改变你的getfiles功能：

def getFiles(files):
    for file in files:
        file_start, file_number, file_end = file.split('-')
        num = file_number.split().zfill(4)  # num is 4 characters long with leading 0

        new_file = "{}- {} -{}".format(file_start, num, file_end)
        # rename or store the new file name for later rename