On the problem of return function

ask exactly how the two functions work and what"s the difference. Thank you.

clipboard.png 

def createcounter1():
    def it():
        n = 1
        while True:
            yield n
            n = n + 1
    g = it()   

    
    def counter():
        return next(g)
    return counter

-sharp a = createcounter1()  a()=1 a()=2  a()=3 


def createcounter2():
    def it():
        n = 1
        while True:
            yield n
            n = n + 1
    def counter():
        return next(it())   

    return counter

-sharp a = createcounter1()  a()=1 a()=1  a()=1
Python
Jun.24,2021

the generator object g is bound in the first function, and when next is called, the object g is actually traversed, so the returned result will be the unbound object in the second function, and a new generator will be generated each time, so the result will only be 1LJ 1

.

Previous: Detect the loading status of Mini Program

Next: What's the difference between li [:] and li here?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b305d5-40297.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b305d5-40297.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?