The for loop iterates over the list of tuples that is returned by the enumerate() function in the form of (index, element).Then, a conditional “if” statement is used to check when the iteration exactly equals
Example 1: Determine Index of All Matching Elements in List Using for Loop & enumerate() Function In this first example, we will use afor loopalong with theenumerate() functionto get the index of all the matching elements in the list: ...
'hello',1997,2000)After deleting tup:---NameErrorTraceback(most recent call last)<ipython-input-1-a12bbf13863f>in<module>()4del tup5print("After deleting tup : ")--->6print(tup)NameError:name'tup'is not defined 1.1.6 无关闭分隔符 当元组出现在二进制操作...
In Python, indexing refers to the process of accessing a specific element in a sequence, such as a string or list, using its position or index number. Indexing in Python starts at 0, which means that the first element in a sequence has an index of 0, the second element has an index ...
copy() # copied_list 是 my_list 的一个浅拷贝 列表重复* 使用* 用于重复列表。 repeated_list = [1, 2] * 3 # 结果: [1, 2, 1, 2, 1, 2] 列表遍历for while 使用for 循环或 while 循环遍历列表。 # for循环和while循环将打印 my_list 中的所有元素 for item in my_list: print(item) ...
index_of_banana = fruits.index('banana') # 输出: 2 列表操作符示例: list1 = [1, 2, 3] list2 = [4, 5, 6] # 合并两个列表 combined = list1 + list2 # 输出: [1, 2, 3, 4, 5, 6] # 列表重复 doubled = list1 * 3 # 输出: [1, 2, 3, 1, 2, 3, 1, 2, 3] ...
my_list=['apple','banana','orange']fori,iteminenumerate(my_list):print(f"The index of{item}is{i}") 1. 2. 3. 4. 输出结果和前面的示例相同: The index of apple is 0 The index of banana is 1 The index of orange is 2
alist[-1:] # will return an empty list astr = '' astr[-1] # will generate an IndexError exception whereas astr[-1:] # will return an empty str 1. 2. 3. 4. 5. 6. 区别在于返回空列表对象或空str对象更像是“异常元素”,而不是异常对象。
An index is defined based on specific nodes in the node set for indexing using Selenium WebDriver. You can use the indexes to get a specific item in the list of identified locators. You can learn more about it from this blog on different locators in Selenium. Let’s assume that if you ...
in:用来检查指定元素是否存在于序列中,如果存在,返回 True,否则返回 False。 not in:用来检查指定元素是否不在序列中,如果不在,返回 True,否则返回 False。 len():获取序列的长度,即序列中的元素的个数。该长度值,是序列的最大索引加 1。 min():获取序列中的最小值。