Python在已有文件夹创建文件遇FileNotFoundError求助

AI 小北

2026-6-12

问题解决方法

你的问题核心是f-string中的反斜杠被当作转义字符解析，导致路径异常，同时要确保路径解析符合Python的文件系统规则。以下是几种可行的修复方案：

方案1：使用正斜杠替代反斜杠

Python在文件路径中支持跨平台的正斜杠，完全不需要依赖Windows的反斜杠，直接修改路径拼接方式：

content = ["eat", "drink","sleep"]
filenames = ["todo1.txt","todo2.txt","todo3.txt"]

for stuff, filename in zip(content, filenames):
    # 用正斜杠拼接路径
    with open(f"files/{filename}", "w") as file:
        file.write(stuff)

注意：这里改用with语句，会自动关闭文件，比手动调用file.close()更安全。

方案2：使用原始f-string

在f-string前加r前缀，让Python将字符串视为原始字符串，反斜杠不会被解析为转义字符：

content = ["eat", "drink","sleep"]
filenames = ["todo1.txt","todo2.txt","todo3.txt"]

for stuff, filename in zip(content, filenames):
    with open(rf"files\{filename}", "w") as file:
        file.write(stuff)

方案3：使用`os.path`模块拼接路径（推荐）

用Python内置的路径处理模块，自动适配不同操作系统的路径规则，避免手动拼接的错误：

import os

content = ["eat", "drink","sleep"]
filenames = ["todo1.txt","todo2.txt","todo3.txt"]

for stuff, filename in zip(content, filenames):
    file_path = os.path.join("files", filename)
    with open(file_path, "w") as file:
        file.write(stuff)