python开发_getpass_获取登录名

我们有时候需要获取到计算机的登录名，这时候，就可以使用python中的getpass模块了

下面是我做的demo

运行效果：

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代码部分：

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#python getpass

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#Version  :   1.0

import getpass

'''
    The getpass module provides two functions:

    getpass.getpass(prompt = 'Password:', stream = None)
        Prompt the user form a password without echoing.
        The user is prompted using the string prompt,which
        defaults to 'Password:' .On Unix, the prompt is written
        to the file-like object stream.stream defaults to the
        controlling terminal(/dev/tty) or if that is unavailable
        to sys.stderr(this argument is ignoed on Windows)

        if echo free input is unavailable getpass() falls back to
        printing a warning message to stream and reading from
        sys.stdin and issuing a GetPassWarning.

        Availablity:Macintosh,Unix,Windows.

        Note:
        if you call getpass from within IDLE,the input may be done in
        the terminal you launched IDLE from rather than the idle window
        itself.

        exception getpass.GetPassWarning
            A UserWarning subclass isssued when password input may be echoed.

        getpass.getuser()
            Return the 'login name' of the user.Availavility:Unix,Windows.

            This function checks the environment variables LOGNAME, USER,LNAME and
            USERNAME,in order, and returns the values of the first one which is set
            to a non-empty string.If none are set,the login name from the password
            database is returned on systems which support the pwd module,otherwise,
            an exception is raised.

'''
def get_system_user_name():
    '''return the 'login name' of the user.'''
    return getpass.getuser()

def main():
    user_name = get_system_user_name()
    print('the system user\'s name is : [{}]'.format(user_name))

if __name__ == '__main__':
    main()