Python 模塊與包

print('...................')

main_actor = '張無忌'
main_actress = '趙敏'
fan_main_actor = '成昆'
fan_main_actress = '周芷若'

def light_war():
    print(f"{main_actor}破壞了{fan_main_actor}的陰謀詭計")

def shaolin_war():
    print(f"{main_actor}打敗了{fan_main_actress}")

def ending():
    print(f"{main_actor}和{fan_main_actress}幸福的在一起了")

def change(name):
    global main_actor
    main_actor = name
print("..................."

import sys
import yitian as yt  # as 給模塊重新命名# pycharm報錯，模塊路徑有差異
# sys.path  搜索模塊的路徑
# print(sys.path)
# import yitian  # 如果已經到如果該模塊，此時則不會再執行模塊中的代碼了

print(yt.main_actor)
# print(main_actor)   報錯  當前名稱空間中沒有main_actor

yt.light_war()
yt.shaolin_war()
yt.ending()

print(globals())

結果：

{'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <_frozen_importlib_external.SourceFileLoader object at 0x00000172F298C1D0>, '__spec__': None, '__annotations__': {}, '__builtins__': <module 'builtins' (built-in)>, '__file__': 'F:/python_workspace_hxt/day24 內置模塊 re/yitian.py', '__cached__': None, 'main_actor': '張無忌', 'main_actress': '趙敏', 'fan_main_actor': '成昆', 'fan_main_actress': '周芷若', 'light_war': <function light_war at 0x00000172F2881E18>, 'shaolin_war': <function shaolin_war at 0x00000172F2BFA268>, 'ending': <function ending at 0x00000172F2BFA158>, 'change': <function change at 0x00000172F9C3A400>}

註： 由於模塊在導入的時候會創建自己的名稱空間，所以在使用模塊中的變數的時候一般不會產生衝突

import yitian as yt

main_actor = '周游'
print(yt.main_actor)  # 張無忌
print(main_actor)   # 周游

def change():
    global  fan_main_actress
    fan_main_actress = '呵呵'

jingyong1.py

import yitian  as  yt
yt.fan_main_actress = '哈哈'

jingyong.py

import  yitian as  yt
import  jingyong1

print(yt.fan_main_actress)  # 哈哈

print(__name__)
 
# 結果為__main__

在jinyong.py中

import jinyong1
 
print(__name__)
 
結果為 jinyong1

import yitian as yt  # 導入yitian，但是名字被重命名為yt，就好比變數賦值一樣
a = 1 b = a

yt.shaoli_war()  # 此時可以正常運行

print(globals())


{'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <_frozen_importlib_external.SourceFileLoader object at 0x000002CC30D7C1D0>, '__spec__': None, '__annotations__': {}, '__builtins__': <module 'builtins' (built-in)>, '__file__': 'F:/python_workspace_hxt/day24 內置模塊 re/practice24.py', '__cached__': None, 're': <module 're' from 'C:\\Users\\huxia\\AppData\\Local\\Programs\\Python\\Python36\\lib\\re.py'>, 'sys': <module 'sys' (built-in)>, 'yt': <module 'yitian' from 'F:\\python_workspace_hxt\\day24 內置模塊 re\\yitian.py'>}

一次也可以導入多個模塊

import time，random，json，yitian

# haha.py
__all__ = ["money", "eat"]
money = 100
def eat():    
    print("我是吃")
def drink():    
    print("我是呵呵")


# test.py
from haha import *
eat()
print(money)
drink() # 報錯