如何用 Python 遍历当前目录所有子目录的指定文件进行替换操作?

Question

我想用 Python 遍历当前文件夹下的所有子目录, 并把里面所有的 Test.f03 文件里面的 Source 替换成 Target

# encoding: utf-8
import re
import os
import sys

filepath = []

def AlterContent(filepath):
    Target_File = 'Test.f03'
    FileOpen = open (Target_File,'r')
    w_str = ""
    for line in FileOpen:
        if re.search ('Source', line):
            line = re.sub ('Source', 'Target', line)
            w_str += line
        else:
            w_str += line
    print (w_str)
    WriteOpen = open (Target_File,'w')
    WriteOpen.write (w_str)
    FileOpen.close ()
    WriteOpen.close ()
AlterContent(filepath)

遍历目录的部分怎么写呢.

Answer 1

“当前目录的所有子目录的指定文件” 是指“当前目录的所有子目录 里面 的指定文件” 吗？
若果是的话：

import os
root = r'd:\\'#当前目录
list = os.listdir(root)
fileName = 'Test.f03'

for str in list:
    print(str)
    path = os.path.join(root, str)

    if not os.path.isdir(path):
        continue

    subpath = os.path.join(path, fileName)

    if not os.path.exists(subpath):
        continue

    AlterContent(subpath)