整理于2020年11月下旬，献给不甘平凡的你 更多python3基础知识请查收于：https://blog.csdn.net/weixin_45316122/article/details/109843899
Trick：纯demo，心在哪里，结果就在那里
# -*- coding: utf-8 -*-
# Author : szy
# Create Date : 2019/10/18
# 函数参数传递
# def mytest(num):
# return num * 2
# # 不光可以传递变量,还可以传递函数
# def convert(func, seq):
# print('convert sequence of numbers to same type')
# return [func(eachNum) for eachNum in seq]
#
#
# myseq = [123, 45.67, -6.2e8]
# # 面向对象编程说白了就是把对象传来传去，对象是第一要素
# # 面向函数编程说白了就是把函数传来传去，函数是第一要素
# print(convert(int, myseq))
# print(convert(float, myseq))
# print(convert(mytest, myseq))
# print(convert(lambda x: x*2, myseq))
# 闭包
# def log(func):
#
# def wrapper(x):
# print("in wrapper")
# func(x)
# return wrapper
# # 装饰器
# @log
# def my_deca(x):
# print("hello deca")
# print(x)
#
#
# my_deca(4)
"""
# 生成器 有点像你熟悉的Iterator
g = (num*2 for num in myseq)
print(g)
for i in g:
print(i)
# 参数的默认赋值
def taxMe(cost, rate=0.0825):
return cost + cost * rate
print(taxMe(100))
print(taxMe(100, 0.05))
def taxMe2(cost, rate=0.0825, *theRest):
for eachRest in theRest:
print('another arg:', eachRest)
cost += eachRest
return cost + cost * rate
print(taxMe2(100, 0.05, 100, 200, 300, 400, 500, 600, 700))
print(taxMe2(100))
def taxMe3(cost, rate=0.0825, **theRest):
for eachRest in theRest.keys():
print('another arg:', eachRest)
cost += theRest[eachRest]
return cost + cost * rate
print(taxMe3(100, 0.05, electric=100, water=200, gas=300))
"""
# 文档内部的数据更新
#包与目录
# -*- coding: utf-8 -*-
# Author : szy
# Create Date : 2019/10/18
# 函数参数传递
# def mytest(num):
# return num * 2
# # 不光可以传递变量,还可以传递函数
# def convert(func, seq):
# print('convert sequence of numbers to same type')
# return [func(eachNum) for eachNum in seq]
#
#
# myseq = [123, 45.67, -6.2e8]
# # 面向对象编程说白了就是把对象传来传去，对象是第一要素
# # 面向函数编程说白了就是把函数传来传去，函数是第一要素
# print(convert(int, myseq))
# print(convert(float, myseq))
# print(convert(mytest, myseq))
# print(convert(lambda x: x*2, myseq))
# 闭包
# def log(func):
#
# def wrapper(x):
# print("in wrapper")
# func(x)
# return wrapper
# # 装饰器
# @log
# def my_deca(x):
# print("hello deca")
# print(x)
#
#
# my_deca(4)
"""
# 生成器 有点像你熟悉的Iterator
g = (num*2 for num in myseq)
print(g)
for i in g:
print(i)
# 参数的默认赋值
def taxMe(cost, rate=0.0825):
return cost + cost * rate
print(taxMe(100))
print(taxMe(100, 0.05))
def taxMe2(cost, rate=0.0825, *theRest):
for eachRest in theRest:
print('another arg:', eachRest)
cost += eachRest
return cost + cost * rate
print(taxMe2(100, 0.05, 100, 200, 300, 400, 500, 600, 700))
print(taxMe2(100))
def taxMe3(cost, rate=0.0825, **theRest):
for eachRest in theRest.keys():
print('another arg:', eachRest)
cost += theRest[eachRest]
return cost + cost * rate
print(taxMe3(100, 0.05, electric=100, water=200, gas=300))
"""
# 文档内部的数据更新
#包与目录
# -*- coding: utf-8 -*-
# Author : szy
# Create Date : 2019/10/18
# public
# private
# protected
# 单下划线、双下划线、头尾双下划线说明：
# __foo__: 定义的是特殊方法，类似 __init__() 之类的。
# _foo: 以单下划线开头的表示的是 protected 类型的变量，即保护类型只能允许其本身与子类进行访问，不能用于 from module import *
# __foo: 双下划线的表示的是私有类型(private)的变量, 只能是允许这个类本身进行访问了。
#
# class AddrBookEntry(object):
# myVersion = '1.0' # 类属性
# __slots__ = ['name', 'phone', '__extra', '_protect']
# 定义构造方法/
# 定义方法
# def updatePhone(self, new_phone):
# self.phone = new_phone
# print('Updated phone# for:', self.name)
#
# def __add__(self, other):
# print(self.name + ' ' + other.name)
#
# def __str__(self):
# return "%s to string" % self.name
# def __getattribute__(self, item):
# print("__getattribute__ is called() %s" % item)
# return object.__getattribute__(self, item)
# class Addr(AddrBookEntry):
# pass
# 创建实例
# john = AddrBookEntry('John', '123')
# jane = AddrBookEntry('Jane', '456')
#
# print(john)
# print(john.name, john.phone)
# print(jane.name, jane.phone)
# john.updatePhone("000")
# print(john.name, john.phone)
# print(AddrBookEntry.myVersion)
#
# john.gender = "male"
# print(john.gender)
# addr = Addr("yasaka", "186")
# print(addr._protect)
# print(addr.__extra)
# john + jane
# print(bool([None]))
# print(1/2)
# print(3.0/2.0)
# print(1//2)
# print(3.0//2.0)
#
# a, b = divmod(15, 6)
# print(a, b)
#
# a = ("one", "two")
# print(a[0])
# b = "just-one",
# print(b[0])
# c = ("just-one")
# print(c[0])
# d = "just-one"
# print(d[0])
