** * This article is from Udemy "[Introduction to Python3 taught by active Silicon Valley engineers + application + American Silicon Valley style code style](https://www.udemy.com/course/python-beginner/" Introduction to Python3 taught by active Silicon Valley engineers + application + American Silicon Valley style code style ")" It is a class notebook for myself after taking the course of. It is open to the public with permission from the instructor Jun Sakai. ** **
l = ['Good morning', 'Good afternoon', 'Good night']
for i in l:
print(i)
result
Good morning
Good afternoon
Good night
def greeting():
yield 'Good morning'
yield 'Good afternoon'
yield 'Good night'
g = greeting()
print(next(g))
print(next(g))
print(next(g))
result
Good morning
Good afternoon
Good night
In Python, if there is a yield inside the def, that function will be recognized as a generator.
You can process elements one by one by using next ().
This may not be of much benefit, but let's take a look at the following code.
def greeting():
yield 'Good morning'
yield 'Good afternoon'
yield 'Good night'
g = greeting()
print(next(g))
print('run!')
print(next(g))
print('run!')
print(next(g))
result
Good morning
run!
Good afternoon
run!
Good night
If you write using a for loop, the process will run from the beginning to the end at once. With the generator, you can stop the process at any time and run another process.
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