[Python] How to move a line?

Question

Python

Greetings, it is necessary to improve the code, namely, to make the line that will be given move to the right (as in a running line), and at the end, on the right side, the characters slowly disappear one by one.

import time

stroka = input("")

for slovo in stroka:
    print(slovo,end="  ", flush=True)
    time.sleep(1) # Время в мс

Answer 1

It is not entirely clear how it is supposed to move to the right, usually the scrolling line moves to the left. But if you wish, you can change the display, if you really need it in the opposite direction.

import time

stroka = input("")

num_chars = 5 # размер окна символов

for i in range(len(stroka)-num_chars+1):
    print(stroka[i:i+num_chars],end="\r", flush=True)
    time.sleep(1) # Время в мс

Answer 2

For the sake of clarity, here's what I can suggest:

import sys 
from time import sleep 

def cut_frame(s: str, start_pos: int = 0, frame_size: int = None) -> str: 
    frame_size = frame_size or len(s)
    left_space = ' ' * min(start_pos, frame_size) 
    if start_pos < 0: 
        s = s[-start_pos:] 
    return f'{(left_space + s)[:frame_size]:{frame_size}}' 


def scroll(s: str, frame_size: int = None, timeout: float = 0.1, template: str = '[{}]', file=sys.stdout): 
    frame_size = frame_size or min(len(s), 80) 
    for i in range(-len(s), frame_size + 1)[::-1]: 
        substring = template.format(cut_frame(s, i, frame_size)) 
        print(substring, end='\033[0G', flush=True, file=file) 
        sleep(timeout)

I have not tried it in the Windows terminal, but if ANSI sequences are supported, then it should scroll as expected.