所有的序列类型都可以进行某些特定的操作,这些操作包括:索引(indexing),分片(sliceing),加 (adding),乘(multipling),以及检查某个元素是否在序列中的in,此外,python还提供了一些内建(build-in)函数,如:max,min,len等。 索引操作(包括列表与元组) 接下来,我们看看索引操作相关的例子,很明显它可以直接以变量的方式...
索引(indexing)。你可使用索引来获取元素。这种索引方式适用于所有序列。当你使用负数索引时,Python将从右(即从最后一个元素)开始往左数,因此-1是最后一个元素的位置。 >>> names = ["zhangsan","lisi"]>>>print(names[-]) lisi 对于字符串字面量(以及其他的序列字面量),可直接对其执行索引操作,无需先将...
这里说一说in运算符,对于早期python版本(<2.3),判断字符是否在字符串中可以用in,但是这个只能用于判断单个字符,只有在2.3版本后,才可以允许多个字符的判断。 >>> 'h' in "hello" True >>> 'hell' in "hello" True >>> 3 in (1,2,3) True 1. 2. 3. 4. 5. 6. 如果在早期版本不能使用,则可以...
A tuple can be compared to a list for its indexing, repetition, and nested objects. However, unlike lists that are mutable, a Tuple is immutable. Creating Tuples in Python To create a tuple we will use () operators. mytuple = ("JAVA", "Python", "Kotlin", "NodeJS") print(mytuple...
python. # Create a tuple using parentheses. my_tuple = (1, 2, 3, 4, 5)。 # Create a tuple using the tuple() constructor. my_tuple = tuple([1, 2, 3, 4, 5])。 2. Tuple Indexing. Elements in a tuple can be accessed using their index. Indexing starts from 0. python. # Acc...
As an ordered sequence of elements, each item in a tuple can be called individually, through indexing. Each item corresponds to an index number, which is an integer value, starting with the index number0. Info:To follow along with the example code in this tutorial, open a Python interactive...
You can perform indexing and slicing operations on both lists and tuples. You can also have nested lists and nested tuples or a combination of them, like a list of tuples.The most notable difference between lists and tuples is that lists are mutable, while tuples are immutable. This ...
Create tuples using different approaches in Python Access one or more items in a tuple using indexing and slicing Unpack, return, copy, and concatenate tuples Reverse, sort, and traverse tuples using loops and other tools Explore other features and common gotchas of tuples With all this knowle...
-Python没有char数据类型,当我们对phrase[0]使用type()函数【python内置函数,返回输入的变量类型】时,它仍然属于String类型。 -len()函数可以获取一个字符串的大小。 """ String indexing examples. """ phrase = "Python is great!" # first character ...
索引(indexing) [与字符串的索引一样,列表索引从0开始] 分片(Slicing) [截取、组合] 序列相加(adding) 乘法(multiplying) 成员资格 长度 最小值 最大值 。列表可以进行截取、组合等 3.1 通用序列操作 3.1.1 索引 序列中所有元素都是由编号的,从0开始递增。而负数代表从右往左取元素。