python的資料型別有:數字(int)、浮點(float)、字串(str),列表(list)、元組(tuple)、字典(dict) 、集合(set)。
一般透過以下方法來判斷:
1、isinstance(參數1,參數2)
描述:此函數用來判斷一個變數(參數1)是否是已知的變數型別(參數2) 類似type()
參數1:變數
參數2:可以是直接或間接類別名稱、基本型別或由它們組成的元組。
傳回值: 如果物件的類型與參數二的類型(classinfo)相同則傳回True,否則傳回False。
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範例:
#判断变量类型的函数 def typeof(variate): type=None if isinstance(variate,int): type = "int" elif isinstance(variate,str): type = "str" elif isinstance(variate,float): type = "float" elif isinstance(variate,list): type = "list" elif isinstance(variate,tuple): type = "tuple" elif isinstance(variate,dict): type = "dict" elif isinstance(variate,set): type = "set" return type # 返回变量类型 def getType(variate): arr = {"int":"整数","float":"浮点","str":"字符串","list":"列表","tuple":"元组","dict":"字典","set":"集合"} vartype = typeof(variate) if not (vartype in arr): return "未知类型" return arr[vartype] #判断变量是否为整数 money=120 print("{0}是{1}".format(money,getType(money))) #判断变量是否为字符串 money="120" print("{0}是{1}".format(money,getType(money))) money=12.3 print("{0}是{1}".format(money,getType(money))) #判断变量是否为列表 students=['studentA'] print("{0}是{1}".format(students,getType(students))) #判断变量是否为元组 students=('studentA','studentB') print("{0}是{1}".format(students,getType(students))) #判断变量是否为字典 dictory={"key1":"value1","key2":"value2"} print("{0}是{1}".format(dictory,getType(dictory))) #判断变量是否为集合 apple={"apple1","apple2"} print("{0}是{1}".format(apple,getType(apple)))
返回:
##2、透過與已知類型的常數進行比較
範例:
#判断变量类型的函数 def typeof(variate): type1 = "" if type(variate) == type(1): type1 = "int" elif type(variate) == type("str"): type1 = "str" elif type(variate) == type(12.3): type1 = "float" elif type(variate) == type([1]): type1 = "list" elif type(variate) == type(()): type1 = "tuple" elif type(variate) == type({"key1":"123"}): type1 = "dict" elif type(variate) == type({"key1"}): type1 = "set" return type1 #返回变量类型 def getType(variate): arr = {"int":"整数","float":"浮点","str":"字符串","list":"列表","tuple":"元组","dict":"字典","set":"集合"} vartype = typeof(variate) if not (vartype in arr): return "未知类型" return arr[vartype] #判断变量是否为整数 money=120 print("{0}是{1}".format(money,getType(money))) #判断变量是否为字符串 money="120" print("{0}是{1}".format(money,getType(money))) money=12.3 print("{0}是{1}".format(money,getType(money))) #判断变量是否为列表 students=['studentA'] print("{0}是{1}".format(students,getType(students))) #判断变量是否为元组 students=('studentA','studentB') print("{0}是{1}".format(students,getType(students))) #判断变量是否为字典 dictory={"key1":"value1","key2":"value2"} print("{0}是{1}".format(dictory,getType(dictory))) #判断变量是否为集合 apple={"apple1","apple2"} print("{0}是{1}".format(apple,getType(apple)))
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