python yield form

代码:

import time

def generator1():
    item = range(10)
    for i in item:
        yield i

def generator2():
    yield 'a'
    yield 'b'
    yield 'c'
    yield from generator1() #yield from iterable本质上等于 for item in iterable: yield item的缩写版
    yield from [11,22,33,44]
    yield from (12,23,34)
    yield from range(3)

for i in generator2() :
    print(i)
    time.sleep(0.5)

# 输出结果
# "D:/blog/yield from.py"
a
b
c
0
1
2
3
4
5
6
7
8
9
11
22
33
44
12
23
34
0
1
2

Process finished with exit code 0