you can use this only if you know the index of the element you wanted to remove. Note that theremove() methoddoesn’t take the index as an argument however, you can get the element by index usinglist[index]and use the value to the method. Let’s create a list namedtechnologyand remo...
代码运行次数:0 >>>myList=[1,2,3,3,2,2,4,5,5]>>>myList[1,2,3,3,2,2,4,5,5]>>>myList=list(set(myList))>>>myList[1,2,,4,5]>>>
remove('chicken') ValueError: list.remove(x): x not in list 如果该值在列表中出现多次,则只会删除该值的第一个实例。在交互式 Shell 中输入以下内容: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>> spam = ['cat', 'bat', 'rat', 'cat', 'hat', 'cat'] >>> spam.remove('cat...
其中iterable是可迭代对象,default与min( ) 函数中的default功能相同,可选,用于设置在没有下一个元素时返回该默认值,如果不设置,又没有下一个元素则会触发 StopIteration 异常。 >>> list=[1,2,3,4] >>> it = iter(list) # 创建迭代器对象 >>> print (next(it)) # 输出迭代器的下一个元素 1 >>...
list.add(2); } /** 运行无异常,测试符合预期 */ @Test @DisplayName("基础for循环中删除元素测试") void testBasicForLoop() { for (int i = 0; i < list.size(); i++) { if (Objects.equals(list.get(i), 2)) { // IDEA警告:Suspicious 'List.remove()' in the loop ...
TypeError: list indices must be integers or slices, not float >>> spam[int(1.0)] 'bat' 列表还可以包含其他列表值。可以使用多个索引来访问这些列表中的值,如下所示: >>> spam = [['cat', 'bat'], [10, 20, 30, 40, 50]] >>> spam[0] ...
TypeError: list indices must be integers or slices, not str 上面的错误代码中将‘1’与1混淆了,前者是字符串,后者才是整数。可以这样改, >>> a[1] 'bbb' >>> a[1:] ['bbb', 'ccc'] 34. ValueError: substring not found 使用字符串的index函数的时候,子字符串必须在被搜索的字符串中存在。
Using the remove() function Theremove()function is Python’s built-in method to remove an element from a list. Theremove()function is as shown below. list.remove(item) Below is a basic example of using theremove()function. The function will remove the item with the value3from the list...
首先,有两个“原始”数据列表: list1 = [1,3,5,7,9]list2 = [200,2] 然后,有两套“兴趣指数”: y = [0, 3] # indices of interest for list1n = [0, 1] # indices of interest for list2 我认为以下几点可以达到你的目的: product = [(index1, index2) for index2 in n for index1...
mylist.remove(item) # Example 2: Using list comprehension # To remove all even numbers mylist = [item for item in mylist if item % 2 != 0] # Example 3: Remove multiple items from a list # Using enumerate function mylist = [item for i, item in enumerate(mylist) if item % 2 ...