Python中try...except无法捕获FileNotFoundError问题修复需求

原代码的第二个try-except块无效的核心原因是：input()仅读取用户输入的字符串，不会触发FileNotFoundError，异常捕获逻辑完全起不到作用。要实现路径有效性校验，需要主动检查输入路径是否存在，调整后的逻辑如下：

• 若用户输入非空路径，先验证路径是否真实存在
• 路径无效时提示用户重新输入，直到输入有效路径或留空（默认使用当前工作目录）
• 确保在创建文件前完成路径校验，避免向无效路径写入文件

修复后的完整代码：

# This program can make files of any type as you wish

import os  # 改用完整os模块，方便路径检查与当前目录获取

# Ask's For extension
file_extension = input("Please enter the file type as .extension (E. g. ->> .txt , .py , .png , etc): ")

# Takes number of files that are required and if something wrong is entered such as char then throws error
while True:
    try:
        number_of_files = int(input('Please Enter the number of files needed: '))
        break
    except ValueError:
        print("Enter a valid number...")

# Takes the name of file
file_name = input("Please enter the name of file: ")

# Takes path of file - 修复后的路径验证逻辑
while True:
    path_name = input("Enter the path if specified else ignore\n(E.g. ->> D:/alpha/ would store in folder alpha inside Disc D)\nNote add a \"/\" in between and also at end: ")
    # 处理空输入：自动使用当前工作目录
    if not path_name:
        path_name = os.getcwd()
        break
    # 验证路径是否存在
    if os.path.exists(path_name):
        break
    else:
        print("Enter a valid path or just press enter to continue")

# To make a appropriate name
file_name_with_path = os.path.join(path_name, file_name)

# Makes appropriate files
for i in range(1, (number_of_files+1)):
    with open(f"{file_name_with_path}-{i}{file_extension}", "w") as f:
        f.write('')

关键修改说明：

• 替换单独导入path为完整os模块，方便调用路径检查和当前目录获取函数
• 移除无效的try-except块，改为主动校验路径存在性
• 增加空输入处理：自动使用当前工作目录（os.getcwd()）
• 每次输入路径后立即验证有效性，无效则提示重新输入

内容的提问来源于stack exchange，提问作者Rishabh Shah