Show Fibonacci numbers in oneline, keeping to refresh stdout (You are not expected to see this; there are much more useful examples in the Internet)

fibo.py

#!/bin/env python

from time import sleep
import sys


def yield_fibonacci_nums(n):
    a = b = 1
    if n < 2:
        yield b
    for _ in range(n-1):
        a, b = b, a + b
        yield b


def print_in_oneline(string):
    sys.stdout.write('\r')
    sys.stdout.write(string)
    sys.stdout.flush()
    sleep(0.005)


def print_fibonacci_nums(n, padding=1):
    func_tmpl = "fibonacci({n})"
    padding = padding + len(func_tmpl.format(n=''))
    tmpl = "{{func:{p}}}: {{result}}".format(p=padding)

    for num in yield_fibonacci_nums(n):
        func = func_tmpl.format(n=n)
        string = tmpl.format(func=func, result=num)
        print_in_oneline(string)
    sys.stdout.write('\n')


if __name__ == "__main__":
    try:
        LIMIT = int(sys.argv[1])
    except (ValueError, IndexError):
        sys.stdout.write("Show until 100th Fibonacci numbers\n")
        LIMIT = 100
    PADDING = len(str(LIMIT))

    for i in range(LIMIT+1):
        print_fibonacci_nums(i, padding=PADDING)