我试图创建一个编辑文本的程序，让你从一些东西中选择，并将它们更改为几个选项中的一个

Question

    import os, re
config_file = "jsm_gyro_config.txt"
#fptr = open(config, "w")
#text = "demo text"
#fptr.write(text)
#fptr.close()

file = open(config_file, 'r')
file-read = file.read()

for line in file-read:
    if re.search(userinput, file-read):
        x = re.search(userinput, file-read)
        # iteminputted is what the user wants to replace
        iteminputted = "ref"
        startpostion = x.span[1] + 3
        endpostion = startposition + len(iteminputted)
        # Find out how to write to a specific location in a file that will finish this off
    else:
        print("Item not found")

这就是我尝试过的，这是我的思考过程，一如既往，任何帮助都会被接受，请让一个笨蛋理解它：

Answer 1

首先，您不应该在变量声明中使用-，因为它实际上是一个运算符，并且将始终被视为运算符。它将尝试减法。

这是与固定和输入相同的代码

import os, re
config_file = "jsm_gyro_config.txt"
#fptr = open(config, "w")
#text = "demo text"
#fptr.write(text)
#fptr.close()

file = open(config_file, 'r')
file_read = file.read()
file.close() # You should always close your files.

for line in file_read:
    if re.search(userinput, file_read):
        x = re.search(userinput, file_read)
        # iteminputted is what the user wants to replace
        iteminputted = input("Input what you would like to replace > ")
        startpostion = x.span[1] + 3
        endpostion = startposition + len(iteminputted)
        # Find out how to write to a specific location in a file that will finish this off

    else:
        print("Item not found")

但是你的问题很不清楚，我已经尽了最大的努力。