alligator.py

age = 10
nickname = "ag"

def information():
    print("Age: ",age)
    print("Nickname: "+nickname)

1、import alligator和import alligator as ag的区别

import alligator as ag，将ag来代替alligator。

>>>import alligator
>>>alligator.information()
Age:  10
Nickname: ag

>>>import alligator as ag
>>>ag.information()
Age:  10
Nickname: ag

2、import alligator和from alligator import information的区别

from alligator import information，相当于将代码直接加载运行

>>>from alligator import information
>>>information()
Age:  10
Nickname: ag

3、from alligator import information和from alligator import information as info的区别

 from alligator import information as info，将info来代替information。

>>>from alligator import information as info
>>>info()
Age:  10
Nickname: ag