How would I print out a string one letter at a time using Python Curses?-CodePudding

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.

CodePudding user response：

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.