>>> print('Python', '高效编程', sep = '*') Python*高效编程 1. 2. 格式化输出字符串的三种方式: name = 'Python高效编程' fmt1 = f'公众号:{name}' fmt2 = '公众号:{}'.format(name) fmt3 = '公众号:%s' %name print(fmt1) print(fmt2) print(fmt3) # 公众号:Python高效编程 1. ...
radius):self.radius=radiusclassSquare:def__init__(self,side):self.side=side可以使用参数列表(args...
<class 'tuple'> <class 'tuple'>当有多个返回值的时候，返回的数据类型默认为元组。6.一个自定义函...
In Python, functions are first-class objects. A first-class object is an object that can be assigned to a variable, passed as an argument to a function, or used as a return value in a function. So, you can use a function object as a return value in any return statement. A function...
(1, 2, 3) <class 'tuple'> Python return Statement with finally block When the return statement is executed inside a try-except block, the finally block code is executed first before returning the value to the caller. Example: def hello(): try: return 'hello try' finally: print('finally...
注意:类与对象之间的绑定方法。调用绑定方法,python 会自动传值,会将调用者本身当作参数传给self,第一值。 print(gi.attack) #调用绑定方法,类绑定给g1 print(Garen.attack) #函数 class Garen: camp='Demacia' def __init__(self,nickname): self.nick=nickname #给实例自己定义一个别名,由外部传入 #g1...
{'name': <class'str'>,'age':'int > 0','return': <class'str'>} typing:强类型声明 1、typing介绍 Python是一门弱类型的语言,很多时候我们可能不清楚函数参数的类型或者返回值的类型,这样会导致我们在写完代码一段时间后回过头再看代码,忘记了自己写的函数需要传什么类型的参数,返回什么类型的结果,这样就...
from dataclassesimportdataclass from typingimportSelf @dataclassclassBankAccount:account_number:intbalance:float defdisplay_balance(self)->Self:print(f"Account Number: {self.account_number}")print(f"Balance: ${self.balance:,.2f}\n")returnself ...
今天刷牛客的时候碰到一个题,觉得给学java的新人来说很有提醒功能。先放代码。 public class Demo1 { public static int add(int a,int b) { try { return a + b; } catch (Exception e) { System.out.println(3); e.printStackTrace(); }finally { a=0... ...
什么事都不做的函数就是一个空函数。 即便是一个空函数,它也会有如下属性: ['__call__', '__class__', '__closure__', '__code__', '__defaults__', '__delattr__', '__dict__', '__doc__', '__format__', '__get__', '__getattribute__', '__globals__', '__hash__'...