@dataclassclassBankAccount:account_number:intbalance:float defdisplay_balance(self)->Self:print(f"Account Number: {self.account_number}")print(f"Balance: ${self.balance:,.2f}\n")returnself defdeposit(self,amount:float)->Self:self.balance+=amountreturnself defwithdraw(self,amount:float)->Self...
classRectangle:def__init__(self,width,height):self.width=width self.height=heightdefget_area(self):returnself.width*self.height my_rectangle=Rectangle(5,10)result=my_rectangle.get_area()print(result)# 输出:50 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 在上面的代码中,我们定义了一个名...
LogisticRegression(C=1.0, class_weight=None, dual=False, fit_intercept=True,intercept_scaling=1, max_iter=100, multi_class='ovr', n_jobs=1,penalty='l2', random_state=None, solver='liblinear', tol=0.0001,verbose=0, warm_start=False) 总结:return self 返回的是类的实例...
return f"Name: {self.name}, Age: {self.age}, Grade: {self.grade}" class Classroom: def __init__(self, name): self.name = name self.students = [] def add_student(self, student): self.students.append(student) def get_students(self): return self.students # 创建一个班级对象实例 cl...
class foo: def __init__(self, num, seq): self.num = num self.seq = seq def __len__(self): return len(self.seq) def __eq__(self, other): return self.num == other.num def __lt__(self, other): return self.num < other.num ...
classFoo(object):def__init__(self):self.myattr =0defbar(self):self.myattr +=1returnselff = Foo() f.bar().bar().bar() print(f.myattr) 输出结果为3. 把bar()方法改为返回return None, 则上述代码会出错。 classFoo(object):def__init__(self): ...
通过使用Self,我们可以使函数返回类的实例。正如我们在输出中所看到的,当我们调用一个类的函数时,它不会给予任何输出,我们可以使用print语句打印对象。 # Import Self from typing import Self # Define a base class class Car: def set_brand(self, brand: str) -> Self: self.brand = brand return self ...
class Person: def __init__(self, name): self.name = name def introduce(self): print(f"Hello, my name is {self.name}.") alice = Person("Alice") alice.introduce() # 输出: Hello, my name is Alice. 在这里 ,introduce方法的第一个参数self代表了调用该方法的Person实例 ,即alice,因此可以...
/usr/bin/python3classMyClass:"""一个简单的类实例"""i=12345deff(self):return'hello world'# 实例化类x=MyClass()# 访问类的属性和方法print("MyClass 类的属性 i 为:",x.i)print("MyClass 类的方法 f 输出为:",x.f()) 以上创建了一个新的类实例并将该对象赋给局部变量 x,x 为空的对象...
classDog:family="Canine"def__init__(self,name,breed):self.name=nameself.breed=breedself.tricks=...