ifdata_type==str:# 如果数据类型为字符串print("输入的值是一个字符串。")elifdata_type==int:# 如果数据类型为整数print("输入的值是一个整数。")elifdata_type==float:# 如果数据类型为浮点数print("输入的值是一个浮点数。")else:# 如果数据类型为其他类型print("输入的值是其他类型的数
"""type只能判断变量单个类型,也可以通过 or来进行折中解决""" iftype(value)==int: return"int" eliftype(value)==float: return"float" else: return"Unknow Type of {value}".format(value=value) if__name__=='__main__': print(check_type(10)) print(check_type("10")) print(check_object(...
if TYPE_CHECKING: #reveal_type is not a runtime Python function, # but a debugging facility provided by Mypy. # That’s why there is no import for it reveal_type(authors) authors = 'Bob' book['weight'] = 4.2 del book['title'] if __name__ == '__main__': demo() …/typedic...
In order to avoid thisTraceback Error, we can use the keywordinto check if a substring is contained in a string. In the case of Loops, it was used for iteration, whereas in this case it’s a conditional that can be eithertrueorfalse.It’ll be true if the substring is part of the ...
fromtypesimportMethodType,FunctionType#引入此模块defcheck(arg):"""检查arg是方法还是函数? :param arg: :return:"""ifisinstance(arg,MethodType):print('arg是一个方法')elifisinstance(arg,FunctionType):print('arg是一个函数')else:print('不知道是什么') ...
if isinstance(x, int): # Here type of x is int. x + 1 # OK else: # Here type of x is str. x + 'a' # OK f(1) # OK f('x') # OK f(1.1) # Error Note Optional 类型,可选类型, Optional[X] 相当于Union[X,None]: ...
total *= numberreturntotalif__name__ =='__main__': multiply({"10","20"}) 结果如下: $ mypy main.py main.py:9: error: Incompatible typesinassignment (expression hastype"float", variable hastype"int") main.py:14: error: Argument1to"multiply"has incompatibletype"Set[str]"; expected...
(ls)): if type_mark is not type(ls[i]): return False return True print("检查是否均为同类型", is_same_type([1, 2, 3, 4, 5])) print("检查是否均为同类型", is_same_type([1, 2, "test", 0.2])) print("检查是否均为同类型", is_same_type(['Beijing', "Shanghai", "...
Python 3.5以后引入了类型提示(type hints),虽然不是强制,但使用类型提示可以让代码更清晰,也便于IDE和工具进行静态分析。 复制 # 反模式示例 defadd(a,b):returna+bprint(add(2,3))# 输出:5 1. 2. 3. 4. 5. 复制 # 推荐写法 from typingimportUnion ...
We will be usingmypyas the static type checker in this article, which can be installed by: 我们将在本文mypy用作静态类型检查器,可以通过以下方式安装它: pip3 install mypy 1. You can runmypyto any Python file to check if the types match. This is as if you are ‘compiling’ Python code....