判断文件是否存在

Question

我正在尝试确定文件是否存在，作为 Python 3.7.2 中错误处理过程的一部分。os.path.isfile()然而，作为我尝试使用的过程的一部分，我似乎在 if 语句中遇到了语法错误。

我该如何解决这个问题，以便正确读取？

代码是：

import sys

import os

import random

import time

while True:

    try:

        user_input = input("Enter the path of your file (Remember to include the file name and extension): ")   # Imports user defined file

    if os.path.isfile(user_input) == False:

        print("I did not find the file at, "+str(user_input)                                                    # Checks if file is present

        continue

    else:

        break

编辑：包括错误类型

Answer 1

尝试这个import sysimport osimport randomimport timewhile True:    try:        user_input = input("Enter the path of your file (Remember to include the file name and extension): ")   # Imports user defined file        if os.path.isfile(user_input):            print("I did not find the file at, "+str(user_input))                                                # Checks if file is present            continue        else:            break    except:        print('Error')但是，不需要这么多代码......这就足够了import sysimport osimport randomimport timewhile True:    user_input = input("Enter the path of your file (Remember to include the file name and extension): ")   # Imports user defined file    if not os.path.isfile(user_input):        print("I did not find the file at, "+str(user_input))        continue    else:        # some functions        break

Answer 2

最简单的，因为我不知道你为什么需要一个 try 语句：import ospath = input("Enter the path of your file (Remember to include the file "             "name and extension)")if os.path.exists():    passelse:    print("I did not find the file at, "+str(path))

Answer 3

import osfrom builtins import inputwhile True:    user_input = input(        "Enter the path of your file (Remember to include the file name and extension): ")    if not os.path.isfile(user_input):        print(f"I did not find the file at {user_input}")        continue    else:        break