在python的终端中插入输入时更改图标

如何解决在python的终端中插入输入时更改图标

我正在使用python在终端中创建一个登录面板，我想在输入之前动态更改图标，即，每当用户填充输入时，图标就会更改。

示例：

F:\command_line>python main.py
?  username: # initially there is a question mark.

✓ username: # If the user fills the username the icon changes to ✓

我尝试过：

default = '?'
onChange = '✓'
inp = input(default + " " + name + ":")
# I can't figure out how I can change it

是否可以这样做？如果是这样，我该如何实现？

解决方法

我不会介绍整个过程，但是@PranavHosangadi提供的链接是很好的资源。

似乎您正在使用Windows，因此curses模块无法立即使用。但是，您可以pip install windows-curses来获取大部分功能。尽管我已经注意到curses.KEY_BACKSPACE之类的某些常量在Windows版本上有所不同，但是您可以摆弄它并确定哪种对您有用。

# The module you'll use
import curses

# this is the char value that backspace returns on windows
BACKSPACE = 8

# our main function
def main(stdscr):
    # this is just to initialize the input position
    inp = '? Username:'
    stdscr.addstr(1,1,inp)
    
    # The input from the user will be assigned to 
    # this variable
    current = ''
    # our main method of obtaining user input
    # it essentially returns control after the 
    # user inputs a character
    # the return value is essentially what ord(char) returns
    # to get the actual character you can use chr(char)
    k = stdscr.getch()

    # break the loop when the x key is pressed
    while chr(k) != 'x':
        # remove characters for backspace presses
        if k == BACKSPACE:
            if len(current):
                current = current[:len(current) - 1]
        # only allow a max of 8 characters
        elif len(current) < 8:
            current = current + chr(k)
        
        # when 8 characters are entered,change the sign
        if len(current) == 8:
            inp = '! Username:'
        else:
            inp = '? Username:'
        
        # not clearing the screen leaves old characters in place
        stdscr.clear()
        # this enters the input on row 1,column 1
        stdscr.addstr(1,inp + current)
        
        # get the next user input character
        k = stdscr.getch()

if __name__ == '__main__':
    # our function needs to be driven by curses.wrapper
    curses.wrapper(main)

一些资源：

Official Docs

Some helpful examples 这一部分只有Linux部分，但经过反复试验，这些部分是显而易见的。