pythonpython-3.xstdoutsleep

Slow printing using time.sleep function

I want to print characters of a string slowly on the terminal on the same line using python3. i used this code.

for i in "Hello":
    print(i,end='')
    time.sleep(0.2)

this code waits for 0.2 * 5(len of "Hello") secs and prints all the characters at once.when i use sys.stdout.write() function instead of print function, it prints the characters line by line instead of same line. how do i print characters on same line with delay?

Solution 
  • import sys
import time

for c in "Hello":
    sys.stdout.write(c)
    sys.stdout.flush() # <- add this 
    time.sleep(0.2)

    Or use the flush parameter in the python 3 print function

    print(c, end='', flush=True)