一.isinstance和issubclass 1.isinstance class Animal: def eat(self): print('刚睡醒吃点儿东西') class Cat(Animal): def play(self): print('猫喜欢玩儿') ...
/usr/bin/env python#-*- coding:utf-8 -*-#isinstance(obj,cls) #用于判断obj对象是否由cls这个类实例化出来的#若实例化对象的类继承了父类,判断对象isintance父类也返回TrueclassFoo:def__init__(self,name): self.name=name f= Foo('jerry')print(isinstance(f,Foo))#True#issubclass(cls,classinfo)...
n1 = 9printisinstance(n1,str) True classA:passclassB(A):passa=B()printisinstance(a,A) True issubcalss判断类是否为子类 classA:passclassB(A):passprintissubclass(B,A) True
AI代码解释 defquickSort(arr,left=None,right=None):left=0ifnotisinstance(left,(int,float))elseleft right=len(arr)-1ifnotisinstance(right,(int,float))elserightifleft<right:partitionIndex=partition(arr,left,right)quickSort(arr,left,partitionIndex-1)quickSort(arr,partitionIndex+1,right)returnarr ...
参考：https://www.geeksforgeeks.org/class-method-vs-static-method-python/ Difference between Class...
def quickSort(arr, left=None, right=None): left = 0 if not isinstance(left,(int, float)) else left right = len(arr)-1 if not isinstance(right,(int, float)) else right if left < right: partitionIndex = partition(arr, left, right) quickSort(arr, left, partitionIndex-1) quickSort...
>>> isinstance(a, object)True>>> isinstance(a, dict)False>>> isinstance(b, object)True>>> isinstance(b, dict)False>>> isinstance(c, object)True>>> isinstance(c, dict)True复制代码 可以看到dict继承自对象object,这个符合常识。从源码builtins.py中也可以验证这一点: ...
isinstance()会认为子类是一种父类类型。Python3 中,bool 是 int 的子类,True 和 False 可以和数字相加, True==1、False==0 会返回 True*,但可以通过* is 来判断类型。Python 还支持复数,复数由实数部分和虚数部分构成,可以用 a + bj,或者 complex(a,b) 表示, 复数的实部 a 和虚部 b 都是浮点型。数...
isinstance() Checks if an objects is an instance of a specific class. sys() Give access to system specific variables and functions __doc__ Return some documentation about an object __name__ Return the name of the object.Implementation details of functional programming, for vs mapFunctional pro...
自省就是面向对象的语言所写的程序在运行时,所能知道对象的类型.简单一句就是运行时能够获得对象的类型.比如type(),dir(),getattr(),hasattr(),isinstance(). a = [1,2,3] b = {'a':1,'b':2,'c':3} c = True print type(a),type(b),type(c) # <type 'list'> <type 'dict'> <type ...