#先来看看tuple元组的源码写了什么,方法:按ctrl+鼠标左键点tuple 代码语言:javascript 代码运行次数:0 运行 AI代码解释lass tuple(object): """ tuple() -> empty tuple tuple(iterable) -> tuple initialized from iterable's items If the argument is a tuple, ...
也可以使用tuple()创建一个元组: 不指定参数时,返回一个空元组 使用tuple作为参数时,返回该参数的浅拷贝 其他参数时,尝试将给定的对象转换为tuple类型 1.1.2 元组索引和分片 代码语言:javascript 代码运行次数:0 运行 AI代码解释 tup=('first',5,'white','dog')print(tup[1])print(tup[-2])print(tup[1:...
classCustomTuple(tuple):def__class_getitem__(cls,index):ifindex==0:return'First element'elifindex==1:return'Second element'else:return'Invalid index'# 创建自定义元组对象custom_tuple=CustomTuple()# 使用索引访问元素print(custom_tuple[0])# 输出:First elementprint(custom_tuple[1])# 输出...
popitem() 方法的帮助文档很值得我们阅读,因为其中提到了一个新的术语:LIFO。 popitem()methodofbuiltins.dictinstanceRemoveandreturna(key,value)pairasa2-tuple.PairsarereturnedinLIFO(last-in,first-out)order.RaisesKeyErrorifthedictisempty. LIFO ,即“Last in, First out”,译为“后进先出”,这是计算机科...
一、tuple的方法 二、tuple类解析 >>> help(tuple) Help on class tuple in module builtins: class tuple(object) |tuple() -> empty tuple |tuple(iterable) -> tuple initialized from iterable's items (可迭代对象/类:如果 dir(obj,cls)包含有__iter__方法,就代表对象/类是可迭代的) ...
(first, second) = each_line.split(“:”) #将对话从冒号两边分开 find(“:”) #若该行有这个符号,则会返回它在这一行的位置,没有的话返回-1 not each_line.find(“:”) #not会将后面的值取反 元组(tuple) #用小括号表示的列表,一旦创建就不能被改变,相当于const ...
>>> tuple1[0:6:2] (1, 15000.0, 22) # 3、长度 >>> len(tuple1) 6 # 4、成员运算 in 和 not in >>> 'hhaha' in tuple1 True >>> 'hhaha' not in tuple1 False # 5、循环 >>> for line in tuple1: ... print(line)
dict = {'name': 'Zara', 'age': 7, 'class': 'First'}; dict["age"]=27; #修改已有键的值 dict["school"]="wutong"; #增加新的键/值对 print "dict['age']: ", dict['age']; print "dict['school']: ", dict['school']; ...
ExampleGet your own Python Server Create a Tuple: thistuple = ("apple","banana","cherry") print(thistuple) Try it Yourself » Tuple Items Tuple items are ordered, unchangeable, and allow duplicate values. Tuple items are indexed, the first item has index[0], the second item has index...
thistuple = ("apple", "banana", "cherry", "orange", "kiwi", "melon", "mango") print(thistuple[2:5]) Try it Yourself » Note: The search will start at index 2 (included) and end at index 5 (not included).Remember that the first item has index 0.By...