# def calc(n):
# print(n)
# if int(n / 2) == 0:
# return n
# res=calc(int(n / 2))
# return res
#
#
# res=calc(10)
# print(res)
# while True:
# print(10)
#
# import time
#
# person_list=['alex','wupeiqi','linhaifeng','zsc']
# def ask_way(person_list):
# print('-'*60)
# if len(person_list) == 0:
# return '根本沒人知道'
# person=person_list.pop(0)
# if person == 'linhaifeng':
# return '%s說:我知道,老男孩就在沙河匯德商廈,下地鐵就是' %person
#
# print('hi 美男[%s],敢問路在何方' % person)
# print('%s回答道:我不知道,但念你慧眼識豬,你等着,我幫你問問%s...' % (person, person_list))
# time.sleep(100)
# res=ask_way(person_list)
#
#
# print('%s問的結果是: %res' %(person,res))
# return res
#
# res=ask_way(person_list)
# print(res)
# 我 來英 楊建 是徵文
# res等沙河 res等沙河 res等 沙河 return ‘沙河’
# print printres
import time
res=time.sleep(100)
print('----------->')
===================遞歸===============
name='海風'
def huangwei():
name = "黃偉"
print(name)
def liuyang():
name = "劉洋"
print(name)
def nulige():
name = '爐指花'
print(name)
print(name)
nulige()
liuyang()
print(name)
print(name)
huangwei()
print(name)
def calc(n):
print(n)
if int(n / 2) == 0: # 10/2 5/2 2/2
return n
res=calc(int(n / 2))
return res
calc(10)
=====================向前引用==============
# def foo():
# print('from foo')
# bar()
#
# foo()
# def bar():
# print('from bar')
# def foo():
# print('from foo')
# bar()
#
# foo()
# def foo():
# print('from foo')
# bar()
#
# def bar():
# print('from bar')
# foo()
def foo():
print('from foo')
bar()
foo()
def bar():
print('from bar')
================全部變量和局部變量====================
# name='lhf'
#
#
# def change_name():
# global name
# name='帥了一比'
# print('change_name',name)
#
#
# change_name()
# print(name)
# name='lhf'
#
# def change_name():
# name1='帥了一比'
# name2='帥了一比'
# name3='帥了一比'
# print('change_name',name)
# globals
# NAME = "槓娘"
#
# def yangjian():
# # NAME = "史正文"
# global NAME
# NAME = "小東北"
# print('我要搞', NAME)
#
# def qupengfei():
# # NAME = "基"
# print('我要搞', NAME)
#
# yangjian()
# qupengfei()
# NAME = "產品經理"
#
# def yangjian():
# # NAME = "史正文"
# global NAME # 已經聲明,NAME就是全局的的那個變量
# print('我要搞', NAME)
# NAME = "小東北" # 修改 全局的變量
# print('我要搞', NAME)
#
# def qupengfei():
# NAME = "基"
# print('我要搞', NAME)
# 如果函數的內容無global關鍵字,
# - 有聲明局部變量
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# NAME = "自己"
# print('我要搞', NAME)
# qupengfei()
# - 無聲明局部變量
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# NAME.append('XXOO')
# print('我要搞', NAME)
# qupengfei()
# 如果函數的內容有global關鍵字
# - 有聲明局部變量
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# global NAME
# NAME = "自己"
# print('我要搞', NAME)
# qupengfei()
# 錯誤示例
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# NAME = "自己"
# global NAME
# print('我要搞', NAME)
# qupengfei()
# - 無聲明局部變量
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# global NAME
# NAME = ["阿毛"]
# NAME.append('XXOO')
# print('我要搞', NAME)
# qupengfei()
######## 全局變量變量名大寫
######## 局部變量變量名小寫
# 優先讀取局部變量,能讀取全局變量,無法對全局變量重新賦值 NAME=“fff”,
# 但是對於可變類型,可以對內部元素進行操作
# 如果函數中有global關鍵字,變量本質上就是全局的那個變量,可讀取可賦值 NAME=“fff”
# qupengfei()
# yangjian()
# NAME = ["產品經理","廖波溼"]
#
# def yangjian():
# # NAME = "史正文"
# global NAME # 已經聲明,NAME就是全局的的那個變量
# print('我要搞', NAME)
# NAME = "小東北" # 修改 全局的變量
# print('我要搞', NAME)
#
# def qupengfei():
# # NAME = "aS"
# NAME.append('天扎龍')
# print('我要搞', NAME)
#
# qupengfei()
# NAME = ["產品經理","廖波溼"]
# def qupengfei():
# name = "自己"
# global NAME
# print('我要搞', NAME)
# qupengfei()
# NAME = '海風'
#
# def huangwei():
# name = "黃偉"
# print(name)
# def liuyang():
# name = "劉洋"
# print(name)
# def nulige():
# name = '滬指花'
# print(name)
# print(name)
# nulige()
# liuyang()
# print(name)
#
# huangwei()
name = "剛娘"
def weihou():
name = "陳卓"
def weiweihou():
nonlocal name # nonlocal,指定上一級變量,如果沒有就繼續往上直到找到爲止
name = "冷靜"
weiweihou()
print(name)
print(name)
weihou()
print(name)
# 剛娘
# 冷靜
# 剛娘
day15全局變量和局部變量
day15全局變量和局部變量
def change_name(self):
name='帥哥'
print(name)
change_name()
只有函數能把變量私有化
name='ajga'
def yangjiang(self):
name='shizhengwen'
print('我要搞',name)
def qupengfei(self):
name='jiyou'
print('我要搞',name)
global 會改變全局的變量
申明
全局變量 和局部變量
#如果函數的內容無global ,優先讀取全局變量,無法對局部變量進行賦值
# 但是對於可變類型,無法對內部元素進行操作
#如果函數中有global 關鍵字,,變量的本質就是那個全局變量,可讀取可賦值,
#可變類型,不可變類型
#全局變量需要存放在最上面
name=['昌平儘量','聊變更','股本金']
def quejg()
global name
name='jang'
print(name)
nonlocal 上級變量
global 全局變量
前項引用
風溼理論:函數即變量
內存:
變量應用要先創建
函數同樣需要先申明變量然使用
1.遞歸的效率不高
2.必須有個人明確的結束條件
3.遞歸的規模必須不斷減少,
# import os
# name='ouyang'
# #print(name)
# def change_name(self):
# name = '帥哥'
# global name
# print('change_name',name)
# #nam=change_name(self='ouyang')
# #print(name)
# name='x'
# def huangwei():
# name='a'
# print(name)#a
# def liuyang():
# name='b'
# print(name)#b
# def niuluge():
# name='c'
# print(name)#c
# print(name)#b
# niuluge()
# liuyang()
# print(name)#a
# print(name)
# huangwei()
# print(name)
#
# name='gnama'
# def weihou():
# name='chenzuo'
# def weiweiho():
# global name
# name='lengjing'
# weiweiho()
# print(name)
# print(name)
# weihou()
# print(name)
#gname,chenzuo,gnama
# def bar():
# print('from bar')
# def foo():
# print('form foo')
# bar()
# foo()
#
# import time
# person_list=['a','b','c','d','e']
#
# def ask_way(person_list):
#
# if 0==len(person_list):
# return 'none one'
# person=person_list.pop(0)
# print(person)
# if person == 'e':
# print('yes')
# return 'e'
# print('where %s'%person)
# print('no %s,下一個%s'%(person,person_list[0]))
# time.sleep(2)
# res=ask_way(person_list)
# return res
# res=ask_way(person_list)
# print(res)
#
#
person_list=['a','b','c','d','e']
a=person_list.pop(0)
print(a)
a=person_list.pop(0)
print(a)
a=person_list.pop(0)
print(a)
a=person_list.pop(0)
print(a)
a=person_list.pop(0)
print(a)
def cale(n):
print(n)
if int(n/2)==0:
return n
return cale(int(n/2))
cale(100)
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