Python--yield Generator

1. Compare range and Xrange differences

>>> Range (10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> xrange (10)
Xrange (10)

Xrange is created during iteration loops

2.

Yield generator:

Remember the last action, and the next time you execute it, continue

Def func1 ():
Yield 1
Yield 2
Yield 3

For I in Func1 ():
Print I

If you use print, only 1 will be printed, and subsequent 2 and 3 will not be displayed.

With yield, each time a loop is called to yield, it pauses and then resumes execution. Which in turn shows the

The implementation of the xrange is as follows:

def mrange (ARG):
Seed = 0
While True:
Seed = seed + 1
If seed > ARG:
Return
Else
Yield seed

For I in Mrange (4):
Print I

Python--yield Generator