如何使用 Python 诅咒一次打印一个字符串？

Question

For some style in my console applications, I'll often have a string print out one character at at time using code like this:

import time


def run():
    the_string = "Hello world!"
    for char in the_string:
        print(char, end='', flush=True)
        time.sleep(0.1)
    input()


run()

I am looking to do the same with Python Curses, so I can have some more flexibility in other aspects of the application. This is what I have so far:

import curses
import time


def run(stdscr):
    stdscr.clear()
    the_string = "Hello world!"
    for char in the_string:
        stdscr.addstr(char)
        time.sleep(0.1)
    stdscr.getch()


curses.wrapper(run)

problem is this just waits for the duration of the for loop before putting the text on the console. The difference is flush=True so I've tried to include curses.flushinp() at a few different places in the function, but it makes no difference.

Answer 1

You need to call the stdscr.refresh() after writing the string to the screen to refresh the screen.

import curses
import time


def run(stdscr):
    stdscr.clear()
    the_string = "Hello world!"
    for char in the_string:
        stdscr.addstr(char)
        stdscr.refresh()
        time.sleep(0.1)
    stdscr.getch()


curses.wrapper(run)

works fine as you intended.