In this Python tutorial, you will learn how to use list.index() method to find the index of specified element in the list, when there is one occurrence, multiple occurrences, or no occurrence of the specified element in the list with example programs. Python List index() – Get index of...
In this tutorial, we will learn about the Python List index() method with the help of examples. Theindex()method returns the index of the specified element in the list. Example animals = ['cat','dog','rabbit','horse'] # get the index of 'dog' index = animals.index('dog') print(...
因此在使用前,最好先进行判断。 # 避免找不到元素造成的错误element_to_find=60ifelement_to_findinmy_list:index_of_element=my_list.index(element_to_find)print(f"元素{element_to_find}的索引为:{index_of_element}")else:print(f"元素{element_to_find}不在列表中。") 1. 2. 3. 4. 5. 6. ...
my_tuple[2][0]=0# 修改my_tuple的元素列表的内容print(my_list)print(my_tuple) 输出结果: 可见my_list也被修改了 这是因为:python的赋值语句不会创建对象的副本,仅仅创建引用。这里的my_list和my_tuple嵌入的列表共同引用同一个内存对象。 改变my_tuple所引用的对象的值时,my_list的值也会被改变,反之亦...
list()与tuple()接受可迭代对象作为参数,并通过浅拷贝数据来创建一个新的列表或元组。 如果不考虑range()函数,python中没有特定用于列表的内建函数。 range()函数接受一个数值作为输入,输出一个符合标准的列表。 列表类型内建函数列表: --- list.append(obj)---向列表中添加一个对象obj list.count(obj)---...
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 ...
The list is: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]Traceback (most recent call last): File "/home/aditya1117/PycharmProjects/pythonProject/string12.py", line 4, in <module> element = myList[index]IndexError: list index out of range 类似地，如果我们有一个由10个元素组成的元组...
Negative Indexing: Python also supports negative indexing, which starts from the end of the list. This means the last element can be accessed with-1, the second to last with-2, and so forth. In thecolorslist,colors[-1]returns'blue', the last element. ...
代码运行次数:0 运行 AI代码解释 # 假设有一个可能为空的列表 possibly_empty_list=[]# 尝试访问列表的第一个元素try:first_element=possibly_empty_list[0]print(f"第一个元素是: {first_element}")except IndexError:print("列表为空,没有元素可以访问。")...
Write a function to find the index of a given element in a list. For example, with inputs [1, 2, 3, 4, 5] and 3, the output should be 2. 1 2 def find_index(lst, n): Check Code Previous Tutorial: Python Dictionary update() Next Tutorial: Python List append() Share on...