def foo():def bar():print 'in the bar'bar()foo()
# bar()

>>> def ExFunc(n):
     sum=n
     def InsFunc():
             return sum+1
     return InsFunc

>>> myFunc=ExFunc(10)
>>> myFunc()
11
>>> myAnotherFunc=ExFunc(20)
>>> myAnotherFunc()
21
>>> myFunc()
11
>>> myAnotherFunc()
21
>>>

>>>def addx(x):
>>>    def adder(y): return x + y
>>>    return adder
>>> c =  addx(8)
>>> type(c)
<type 'function'>
>>> c.__name__
'adder'
>>> c(10)
18  

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Glenimport timedef bar1(n, k = 6):time.sleep(1)print('in the bar1 n = %s, k = %s' % (n, k))
def bar2():time.sleep(1)print('in the bar2')
# 高阶函数
def foo2(func):start_time = time.time()func()end_time = time.time()print('bar2 run time is = {run_time}'.format(run_time=(end_time - start_time)))
# foo2(bar2)# 嵌套函数
def func1(func):def func2():start_time = time.time()func()end_time = time.time()print('bar2 run time is = {run_time}'.format(run_time=(end_time - start_time)))return func2# 原函数没有参数的装饰器
# bar2 = func1(bar2)
# bar2()  # bar2 的功能已经改变 但调用方式和原函数代码都没有修改def func3(func):def func4(*args, **kwargs):func(*args, **kwargs)print('-----------------')return func4# 适合所有函数的，自身不带参数的装饰器
#bar1 = func3(bar1)
#bar1(8, k=9)@func3  # @func3是python的语法糖，相当于省略了bar3 = func3(bar3)这个赋值动作
def bar3():print('bar3')
bar3()# 自身带参数的装饰器
def func5(par):def decorator(func):def wrapper(*args, **kwargs):func(*args, **kwargs)print('=========================func5 parameter = %s' % par)return wrapperreturn decorator@func5('Glen')  # 相当于bar4 = func5('Glen')(bar4)
def bar4(n):print('n = %s' % n)
bar4('QQ')

abs(-5)  # 求绝对值
all([1, -6, 0])  # 判断一个可迭代对象里面的对象是否全部为真
any([1, -6, 0])  # 如果一个可迭代对象里面有一个为真则为真
bin(255)  # 十进制转2进制
bool(0)  # 判断对象真假
# callable()  # 判断是否可调用，就是func()
print(chr(98))  # ASCII码转为字符
# compile()  # python 底层将代码进行编译，很少用到
eval()  # eval() 函数用来执行一个字符串表达式，并返回表达式的值。
exec()  # 执行储存在字符串或文件中的 Python 语句，相比于 eval，exec可以执行更复杂的 Python 代码。
filter(function, iterable)  # 用于过滤序列，过滤掉不符合条件的元素，返回一个迭代器对象
map(function, iterable, ...)  # 第一个参数 function 以参数序列中的每一个元素调用 function 函数，返回包含每次 function 函数返回值的新列表。
from functools import reduce
reduce()
float()
format()
frozenset()  # 不可变元组，没有clear等方法
globals()  # 返回程序里面所有的变量 key value 的键值对字典
hash()
hex(10)  # 转为16进制
len()
globals()  # 打印所有的全局变量
locals()  # 打印所有的本地变量(函数内部)
memoryview()
next()
oct(10)  # 转8进制
pow(2, 3)  # 2 的 3次方
repr()  # 把对象转为字符串
reversed([1, 2, 6])  # 反转
round(1.4434)  # 保留两位a = {1: 4, 6: 8}
sorted(a.items(), key=lambda x: x[1])  # 对a进行排序，默认按key排序，这里使用lambda函数设置value排序,x是前面a.items,输出未列表
tuple()  # 元组
vars()  # 返回一个对象的所有属性名a = [1, 2, 3]
b = ['a', 'b', 'c']
zip(a, b)   # 将a和b进行一一组合，(1,'a')  (2, 'b')...__import__('model_str')   # 只知道模块的字符串名字的时候的导入方法

enumerate()  # for k,v in enumerate(iter):print(k,v) 同时遍历出index和value

def fib(max):n, a, b = 0, 0, 1while n < max:yield b             # 在这里返回b的值并暂停，next(f)进行调用时继续往下执行a, b = b, a + bn = n + 1return "done"
f = fib(6)
print(f)
for v in f:print(v)
"""
输出：
<generator object fib at 0x000001F3F44043B8>
1
1
2
3
5
8
"""

import json
'''
user_info_all = {'glen': {'password': '123456','limit': 5000,'status': 0},'alex': {'password': '654321','limit': 1200,'status': 0}
}
'''def userinfo_mem():"""读取存量的用户信息:return:"""with open('C:/Users/zxd/PycharmProjects/s14/day4/Atm/atm/user_info.txt', 'r') as f1:data = f1.read()return json.loads(data)def userinfo_persist(user_info_all):"""将用户信息写入文件:param user_info_all::return:"""with open('user_info.txt', 'w') as f:f.write(json.dumps(user_info_all))def login(func):"""用户登陆验证装饰器:param func::return:"""def wapper(*args, **kwargs):user_info_all = userinfo_mem()username = kwargs['username']password = kwargs['password']if password == user_info_all[username]['password']:print('%s login successful' % username)return func(*args, **kwargs)else:print('login fail')return wapper@login
def get_limit(username='username', password='password'):"""用户获取额度接口:param username::param password::return:"""user_info_all = userinfo_mem()limit = user_info_all[username]['limit']return limit@login
def change_limit(username='username', password='password', change_money=0):"""用户额度改变接口:param username::param password::param change_money::return:"""user_info_all = userinfo_mem()limit = user_info_all[username]['limit'] + change_moneyif limit < 0:data = {'status': 1, 'reason': 'lack of credit'}return json.dumps(data)else:user_info_all[username]['limit'] = limituserinfo_persist(user_info_all)data = {'status': 0, 'reason': 'change successful'}return json.dumps(data)@login
def withdraw_deposit(username='username', password='password', withdraw_sum=0):"""提现接口，扣除金额和手续费:param username::param password::param withdraw_sum::return:"""amount = withdraw_sum + withdraw_sum * 0.05result = json.loads(change_limit(username=username, password=password, change_money=int(amount)))if result['status'] == 0:data = {'status': 0, 'reason': 'withdraw deposit successful'}return json.dumps(data)else:data = {'status': 1, 'reason': 'withdraw deposit fail'}return json.dumps(data)@login
def transfer(username='', password='', transfer_username='', transfer_money=0):"""给其他用户转账:param username::param password::param transfer_username::param transfer_money::return:"""if transfer_money < 0:data = {'status': 3, 'reason': "money can't be negative"}return json.dumps(data)money = 0 - transfer_moneydeduct_result = json.loads(change_limit(username=username, password=password, change_money=money))if deduct_result['status'] == 0:transfer_result = json.loads(change_limit(username=transfer_username, password='Starcor@123', change_money=transfer_money))if transfer_result['status'] == 0:data = {'status': 0, 'reason': 'transfer successful', 'transfer_username': transfer_username, 'transfer_money': transfer_money}return json.dumps(data)else:data = {'status': 2, 'reason': 'user info error', 'transfer_username': transfer_username, 'transfer_money': transfer_money}return json.dumps(data)else:data = {'status': 1, 'reason': 'transfer failure', 'transfer_username': transfer_username, 'transfer_money': transfer_money}return json.dumps(data)def add_user(username='', user_password='', limit=0):"""后台管理接口，添加用户:param username::param user_password::param password::param limit::return:"""user_info_all = userinfo_mem()if username not in user_info_all:user_info = {'password': user_password, 'limit': limit, 'status': 0}user_info_all[username] = user_infouserinfo_persist(user_info_all)return 'user add successful'def change_user_status(username='',  status=0):"""冻结用户:param username::param status::return:"""user_info_all = userinfo_mem()if username in user_info_all:user_info_all[username]['status'] = statususerinfo_persist(user_info_all)return 'status change successful'else:return 'user not exist'