Created
March 25, 2013 09:18
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This script demonstrate the `flush` argument of print() function.
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| #!/usr/bin/env python | |
| #-*- coding: utf-8 -*- | |
| from __future__ import print_function | |
| from time import sleep | |
| string = "The words in this sentence should appear letter by letter." | |
| print("Please wait if you don't see another sentence appearing below.", end="\n\n") | |
| for characters in string: | |
| # If flush disabled the another line will appear at once and not char by char. | |
| print(characters, end="", flush=True) | |
| sleep(.1) |
I post a comment two years ago and now I get an email from github about this gist. Also that this gist was here in 2013.
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No, it works as intended. let me explain, all the values passed into print function are buffered until a new line is printed and then the text is flushed to the stream (opened file) or stdout (console).
if there is no new line added after every print function call which can be acheived by adding the optional argument
end=""then the text is buffered. by default the value of end is\nso only way to push the characters to stdout is to flush forcibly which is acheived via
flush=Trueargumentand if flush=False, then you are buffering all the characters and only after the final sleep time the entire text is printed on console
Screen.Recording.2025-12-04.at.10.59.48.AM.mov