a=2deffunc():ifFalse:a=1returna# UnboundLocalError 然而,具体的解析到值的过程,则是在语句运行时才进行的,这个需要着重注意: deffunc():a=1deffunc2():returnaa=2returnfunc2()func()# 2 初学者经常犯的错误就是这样的: defmultipliers(n):funcs=[]foriinrange(0,n):def_func(b):returni*bfuncs...
s1=Student()# s1就是对象,类的具体体现. 三丶从类名的角度使用类 classStudent:''' 备注信息 '''daily='学习'# 变量( 之前 ) 静态属性,属性exam='考试'defwork(self):# 函数(之前) 方法,动态方法print('上课了')defhomework(self):print('做作业了')### 类名角度 : 调用 类中的属性# 1.查看类...
self.name = name def make_sound(self): print("This animal makes a sound.") # 定义子类 class Dog(Animal): """狗类""" def make_sound(self): print("The dog barks.") class Cat(Animal): """猫类""" def make_sound(self): print("The cat meows.") # 使用多态 dog = Dog("旺财"...
classLoginHandler:deflogin(self):passdefregisgter(self):passclassAccount:defget_user_pwd(self):passdefcheck_user_pwd(self):passclassShoppingCar:defshopping(username,money):passdefcheck_paidgoods(username,money):passdefcheck_unpaidgoods(username,money):passdefsave(username,money):pass 从对比可以发现...
>>>classX: ... defbin(self): ... print(f'bin called in X') ... ... classY(X): ... defgo(self): ... print(f'go called Y') ... ... classZ(X): ... defgo(self): ... print(f'go called Z') ... ... classW(Y, Z): ...
class Person: def __init__(self, name): self.name = name # 实例属性 # 创建一个实例 person = Person("Alice") # 修改实例属性的值 person.name = "Bob" # 访问实例属性 print(person.name) # 输出:Bob 在上面的示例中,首先创建了一个实例属性name,然后通过实例来修改了它的值。
Python现在在比较流行的机器学习、AI领域,比如人脸或语音识别等,可以实现看起来特别酷炫的功能,这对...
@app.route('/') @app.route('/hello') def hello(): # Render the page return "Hello Python!" if __name__ == '__main__': # Run the app server on localhost:4449 app.run('localhost', 4449) “添加新项”对话框显示了很多可添加到 Python 项目的其他类型的文件,例如 Python 类、Python...
def generator_(m): n=0 for i in range(m): if n < m: n += 1 ...
class Foo : def call(self) : pass foo = Foo() foo.call() #1 Foo.call(foo) #2 From PEP20 : Explicit is better than implicit. Note that self is not a keyword, you can call it as you wish, it is just a convention. Share Improve this answer Follow edited Mar 20, 2014 at...