python基础（02）——数据类型转化以及运算

#强制数据类型转换（显式数据类型转换）#int() 将其他数据类型转化为整数'''1.整数无需转换2.浮点数转换为整数 直接去掉小鼠部分保留整数部分3.布尔值转换 True -》1  False -》04.复数无法转换5.纯整数字符串可以转换，其余都不可以6.列表，元祖，字典，集合无法转换'''num1 = 22.3print(num1,type(num1))newnum1 = int(num1)print(newnum1,type(newnum1))num1 = Trueprint(num1,type(num1))newnum1 = int(num1)print(newnum1,type(newnum1))var = '22'print(var,type(var))newvar = int(var)print(newvar,type(newvar))#float() 将其他数据类型转化为浮点数'''1.整数转换为浮点数 加.02.浮点数无需转换3.布尔值 True->1.0  False->0.04.复数无法转换5.字符串中纯整数或者纯浮点数字符串可以转换，其他不可以6.列表，元祖，字典，集合无法转换'''var = 10print(var,type(var))newvar = float(var)print(newvar,type(newvar))var = Falseprint(var,type(var))newvar = float(var)print(newvar,type(newvar))var = "10"print(var,type(var))newvar = float(var)print(newvar,type(newvar))var = '31.4'print(var,type(var))newvar = float(var)print(newvar,type(newvar))#bool() 将其他数据类型转化为布尔值'''能够转化为布尔值False的情况1.整形 02.浮点数 0.03.布尔值 False4.复数  0+0j5.字符串 空字符串''6.列表  []7.元组  ()8.字典  {}9.集合  set()'''var = 0print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = 0.0print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = 0+0jprint(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = []print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = ()print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = ''print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = {}print(var,type(var))newvar = bool(var)print(newvar,type(newvar))var = set()print(var,type(var))newvar = bool(var)print(newvar,type(newvar))#complex()将其他区数据类型转换为复数'''1.整数   整数+0j2.浮点数  浮点数+0j3.布尔值  True -》1+0j  False -》0j4.复数无序转化5.字符串  纯整数和浮点数，复数的字符串可以转化，其余都不可以6.列表，元祖，字典，集合无法转换'''var = '2+2j'print(var,type(var))newvar = complex(var)print(newvar,type(newvar))#str() 将其他数据类型转化为字符串'''将其他数据类型全部转换为字符串格式原样输出！'''#容器类数据之间可以互相转换，其他数据（除了字符串）不能转换为容器数据#list() 将其他数据转换为列表'''1.整形，浮点型，布尔值，复数无法转换！2.字符串转换时每个字符转化为列表中的每个值3.列表无需转换4.元祖只改变类型顺序不变5.集合转换为列表，顺序随机6.字典转换为列表，仅保留键，舍弃值！'''var = '七个小矮人和白雪公主'print(var,type(var))newvar = list(var)print(newvar,type(newvar))var = ['天宝','烤鸡',2]print(var,type(var))newvar = list(var)print(newvar,type(newvar))var = (1,2,'笨蛋')print(var,type(var))newvar = list(var)print(newvar,type(newvar))var = {1:2,'zhu':'马德华'}print(var,type(var))newvar = list(var)print(newvar,type(newvar))var = {1,2,3,'铸钢类'}print(var,type(var))newvar = list(var)print(newvar,type(newvar))#tuple() 将其他数据类型转化为元祖'''1.整形，浮点型，布尔值，复数无法转换！2.字符串转换时每个字符转化为元祖中的每个值3.列表只改变类型顺序不变4.元祖无需转换5.集合转换为元祖，顺序随机6.字典转换为元祖，仅保留键，舍弃值！'''var = '人生不过三十年！'print(var,type(var))newvar = tuple(var)print(newvar,type(newvar))#set() 将其他数据类型转换为集合'''1.整形，浮点型，布尔值和复数无法转换2.字符串将每个字符转换为集合中的每个值，相同的值只会保留一份3.列表转换为集合，直接转换，，相同的值只会保留一份美（有序数据转换为无序数据）4.元祖转换为集合，直接转换，，相同的值只会保留一份（有序数据转换为无序数据）5.集合无需转换6.字典转换为集合，仅仅保留键码去掉值'''var = '1232143214234214324321'print(var,type(var))newvar = set(var)print(newvar,type(newvar))var = ['quexinyan',1,2,1]print(var,type(var))newvar = set(var)print(newvar,type(newvar))var = {1:2,3:4,1:3}print(var,type(var))newvar = set(var)print(newvar,type(newvar))#dict() 将其他数据类型转换为字典#二级列表var = [    ['a','啊'],    ['bb','拜拜'],    ['c','吹分级'],]print(type(var))newvar = dict(var)print(newvar,type(newvar))#二级元祖var = (    ('孙','孙俪'),    ('腾','腾格尔'),    ('抓','抓鸡鸡鸡鸡'),)print(type(var))newvar = dict(var)print(newvar,type(newvar))#集合var = {    ('kai','开垦人'),    ('sfad','电脑发了'),    (1,2),    ('散发的','萨达法')}print(type(var))newvar = dict(var)print(newvar,type(newvar))# 普通运算name = "价位动"print(name)#加法运算num1 = 1num2 = 2result = num1 + num2print(result)#减法num1 = 7num2 = 2result = num1 - num2print(result)#地板除num1 = 10num2 = -3result = num1 // num2print(result)#赋值运算a = 1a += 1print(a)#逻辑运算 and有假即假 or有真则真  not真变假，假变真lj1 = Trueli2 = Falseresult = lj1 and li2print(result)lj1 = Trueli2 = Falseresult = lj1 or li2print(result)lj1 = Trueresult = not lj1print(result)#按位与运算var = 19var1 = 10result = var & var1print(result)#按位或运算var = 11var1 = 12result = var | var1print(result)#按位非运算var2 = 10result = ~ var2print(result)#按位抑或运算var1 = 12var2 = 9result = var1 ^ var2print(result)#按位左移运算var1 = 12var1 = 12 << 1print(var1)#按位右移运算var1 = 12var1 = 12 >> 1print(var1)#成员检测，对str，list，tuple，set，dict都可以检测#instrs = "贱人就是矫情"result = "是" in strsprint(result)#not indicts = {'天宝将军':'宇文成都','三国第一':'吕布','赵云':'不怕死'}result = '天宝将军' not in dictsprint(result)#身份检测#is,is notvar1 = 10var2 = 10result = var1 is var2print(result)var3 = -5var4 = -5result = var3 is not var4print(result)str1 = '-6'str2 = '-6'result = str1 is str2print(result)'''整数 -5 + id相同浮点数 0.0 + id相同复数 0j id相同布尔值 id相同相同字符串 id相同'''#数据类型检测isinstance（）,检测是否是指定的数据类型var = 10.12result = isinstance(var,(int,float))print(var)Python学习交流、资源共享群：563626388 QQ