yieldIn addition there is a keyword meaning the meaning of return, as well as temporary storage when running to yield, it returns the current value, and then save the current record. When you run the functional again, continue to the end of the last yield location started running.
Deep understanding, for reference only
Example one
def foo(num):
print("starting...")
while num < 10:
num = num + 1
yield num
# debug看运行顺序 即可
for n in foo(0):
print(n)
Example Two
def gen(n):
for i in range(n):
yield i ** 2
for i in gen(5):
print(i, " ", end="")
