相关疑难解决方法(0)

#!/usr/bin/python3.2
import sys

def match_text(pattern):
    line = (yield)
    if pattern in line:
        print(line)

x = match_text('apple')
x.next()

for line in input('>>>> '):
    if x.send(line):
        print(line)

x.close()

这是一个协程,但Python3.2将其视为生成器 - 为什么？这里发生了什么？我指的是David Beazeley编写的Python Essential Reference:20.

引用相关部分:

Normally, functions operate on a single set of input arguments. However, a function can
also be written to operate as a task that processes a sequence of inputs sent to
it.This type of function is known as a coroutine and is created by using the yield 
statement …