python input()在调用input()之前要使用旧的stdin [英] python input() takes old stdin before input() is called

问题描述

Python3的 input()似乎在两次调用 input()的调用之间采用了旧的std输入.有没有办法忽略旧输入，而仅接受新输入(在 input()被调用之后)?

Python3's input() seems to take old std input between two calls to input(). Is there a way to ignore the old input, and take new input only (after input() gets called)?

import time

a = input('type something') # type "1"
print('\ngot: %s' % a)

time.sleep(5) # type "2" before timer expires

b = input('type something more')
print('\ngot: %s' % b)

输出:

$ python3 input_test.py
type something
got: 1

type something more
got: 2

推荐答案

您可以在第二个 input()之前刷新输入缓冲区，就像这样

You can flush the input buffer prior to the second input(), like so

import time
import sys
from termios import tcflush, TCIFLUSH

a = input('type something') # type "1"
print('\ngot: %s' % a)

time.sleep(5) # type "2" before timer expires

tcflush(sys.stdin, TCIFLUSH) # flush input stream

b = input('type something more')
print('\ngot: %s' % b)

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