import sys

`sys.stdin` and `sys.stdout`

sys.stdin and sys.stdout are useful when creating an interactive session. sys.stdin is a file object and we can loop it through its iterator:

import sys

for line in sys.stdin:
    if line.strip() == 'exit':
        break
    sys.stdout.write(f">> {line}")

Build a status bar using sys.stdout.write. The \r moves the cursor to the beginning of the line:

import time
import sys

for i in range(101):
    time.sleep(0.1)
    sys.stdout.write(f"{i} [{'#' * i}{'.' * (100 - i)}]\r")
sys.stdout.write('\n')

input()

sys.stdin.readline()

The input takes input from the user but does not read escape character.

The readline() also takes input from the user but also reads the escape character.

It has a prompt that represents the default value before the user input.

Readline has a parameter named size, Which is a non-negative number, it actually defines the bytes to be read.

Last updated 2 years ago

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