[Python知识库]Python 判断变量类型

isinstance(参数1,参数2)

描述：该函数用来判断一个变量（参数1）是否是已知的变量类型(参数2) 类似于type()

参数1：变量

参数2：可以是直接或间接类名、基本类型或者由它们组成的元组。

返回值: 如果对象的类型与参数二的类型（classinfo）相同则返回 True，否则返回 False

#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)))