如何替换文件中的列表？

Question

我有一个包含我的密码的文件，如下所示：

Service: x
Username: y
Password: z

我想编写一个删除这些密码部分之一的方法。我的想法是，我可以搜索服务及其被删除的部分。到目前为止代码有效（我可以告诉你，因为如果你在我写删除部分的地方插入 print(section) 它工作得很好），我只是不知道如何从文件中删除一些东西。

fileee = '/home/manos/Documents/python_testing/resources_py/pw.txt'

def delete_password():
    file = open(fileee).read().splitlines()
    search = input("\nEnter Service you want to delete: ")
    if search == "":
        print("\nSearch can't be blank!")
        delete_password()
    elif search == "cancel":
        startup()
    else:
        pass
    found = False
    for index, line in enumerate(file):
        if 'Service: ' in line and search in line:
            password_section = file[index-1:index+3]
            # delete password_section
            found = True
    if not found:
        print("\nPassword for " + search + " was not found.")
        delete_password()

Answer 1

从文件中删除一行等同于重写文件减去该匹配行。

#read entire file
with open("myfile.txt", "r") as f:
  lines = f.readlines()

#delete 21st line
del lines[20]

#write back the file without the line you want to remove
with open("myfile.txt", "w") as f:
  f.writelines(lines)

如何替换文件中的列表？

How to replace a list in a file?

python

python-3.x

file

indexing

enumerate