我的自学Python之路（第二阶段Day6）

def func(b,a):
    
    print(a,b)

func(b=2,a = 1)



def func(a,b):
    print('%s,%s'%(a,b))

func('等等','水电费')    


def func(*args):
    print(args)

func(1,2,[1,2])

def func(**kwargs):
    print(kwargs)

func(a = 1,b =2)    



def func(*args):
    print(args)

li = [1,2]
func(*li)    


def func(**kwargs):
    print(kwargs)

li = {'a':1,'b':2}
func(**li)    

#列表转换为字符串
# li = ['dfd', 'afe', 'd']
# print(''.join(li))
#字符串转换列表
# s = 'skdlffsf'
# print(s.split('l',1))

#倒着打印100-0
'''
for i in range(100,-1,-1):
    print(i)
'''


# def func(a,b):
#     print('%s,%s' % (a, b))
#
# func(1,2)


s=input('>>>')
li = []
for i in s:
    print(i)
    if  i.isdigit() :
        if int(i) % 2 == 1:
            li.append(i)


print(len(li))

# import os
# with open('ss', mode='r+', encoding='utf-8"') as f, open('ssss', 'w',encoding = 'utf-8') as f1:
#    for i in f:
#      if 'alex' in i:
#         i = i.replace('alex', 'sb')
#      f1.write(i)
#
# os.remove('ss')
# os.rename('ssss','ss')


# apple 10
# tesla 100000 1
# mac 3000 2
# lenovo 30000 3
# chicken 10 3
li = []
with open('aa',mode='a+',encoding='utf-8') as f:
    f.write('apple 10 3\n')
    f.write('tesla 100000 1\n')
    f.write('mac 3000 2\n')
    f.write('lenovo 30000 3\n')
    f.write('chicken 10 3\n')
    f.seek(0)
    for i in f:
       s = i.split()
       dic = {'name':s[0],'price':s[1],'account':s[2]}
       li.append(dic)

print(li)

# def 深圳():
#     print('欢迎你')
# 深圳()

def func(l = []):
    l.append(1)
    print(l)
func()
func([])
func()

# def sum(a,b):
#     print(a if a>b else b)
# sum(1,2)

# def input():
#     print(1)
# def func():
#     input = 1
#     print(input)
# func()


# globals和locals方法
# c = 10
# d = 13
# def func():
#     a=12
#     g = 23
#     f = 88
#     b = 13
#     print(locals())
#     # print(globals())
# func()
#print(locals())#globals 永远打印全局的名字
#print(globals())#locals 输出什么 根据locals所在的位置

#global关键字
# a = 10
# def func():
#     global a
#     a = 12
#
# print(a)
# func()
# print(a)

# global a
# a = 10
# def func():
#     # a = 12
#     print(a)
#
#
# print(a)
# func()
# print(a)

a = 10
def func():
    a = 20
    return a
a = func()
print(a)

#函数的嵌套调用
# def max2(x,y):
#     m = x if x>y else y
#     return m
# def max4(x,y,z,w):
#     c = max2(x,y)
#     d = max2(z,w)
#     return max(c,d)
# print(max4(1,5,3,4))

#函数的嵌套定义

# def f1():
#     print(1)
#     def f2():
#         print(2)
#     f2()
# f1()
#函数的作用域链
# def f1():
#     a = 1
#     def f2():
#         global a#只修改了全局变量，上面的局部变量没有修改
#         a = 2
#         print(a)
#     f2()
#     print(a)
# f1()
# print(a)

#nonlocal关键字和global的区别
#nonlocal 只能用于局部变量 找上层中离当前函数最近一层的局部变量
#声明了nonlocal的内部函数的变量修改会影响到 离当前函数最近一层的局部变量
# 对全局无效
# 对局部 也只是对 最近的 一层 有影响
# a=1
# def f1():
#     a = 1
#     def f2():
#         nonlocal a#只修改了全局变量，上面的局部变量没有修改
#         a = 2
#         print(a)
#     f2()
#     print(a)
# f1()
# print(a)

#函数名的本质
#函数名本质上就是函数的内存地址
#1.可以被引用
# def func():
#     print(1)
# f = func
# print(f)
#2.可以被当作容器类型的元素
# def f1():
#     print('f1')
# def f2():
#     print(f2)
# def f3():
#     print(f3)
# l = [f1,f2,f3]
# l[0]()
#3.可以当作函数的参数和返回值
#就当普通变量用

def func():
    print(123)
def wahaha(f):
    f()
    return f           #函数名可以作为函数的返回值
qqxing = wahaha(func)   # 函数名可以作为函数的参数
qqxing()

# name = 'chun'
# def func():
#     name = 'shang'
#     def inner():
#         print(name)
#     # inner()
# func()

# def func():
#     name = 'shang'
#     def inner():
#         print(name)
#     return inner
# f = func()
# f()

#判断闭包函数的方法__closure__

#输出的__closure__有cell元素 ：是闭包函数
# def func():
#     name = 'shang'
#     def inner():
#         print(name)
#     print(inner.__closure__)
#     return inner
# f = func()
# f()
#输出的__closure__为None ：不是闭包函数
#
name = 'shang'
# def func():
#
#     def inner():
#         print(name)
#     print(inner.__closure__)
#     return inner
# f = func()
# f()
#闭包嵌套
# def wrapper():
#     money = 1000
#     def func():
#         name = 'eva'
#         def inner():
#             print(name,money)
#         return inner
#     return func
#
# f = wrapper()
# i = f()
# i()

#闭包函数获取网络应用
from urllib.request import urlopen

def index():
    url = "http://www.xiaohua100.cn/indexhtml"
    def get():
        return urlopen(url).read()
    return get
xiaohua = index()
content = xiaohua()
print(content)