importtimeit# 方法一:使用切片defremove_first_element_slice():my_array=[1,2,3,4,5]my_array=my_array[1:]# 方法二:使用pop()函数defremove_first_element_pop():my_array=[1,2,3,4,5]my_array.pop(0)# 方法三:使用del关键字defremove_first_element_del():my_array=[1,2,3,4,5]delmy_a...
通过使用 pop() 方法,提及数组的第一个索引,即方法括号内的 0 以删除第一个元素。 删除第一个元素后打印数组。 arr = [" Hello ", " Programming ", " Python ", " World ", " Delete ", " Element "] first_index = 0 print(" The elements of the array before deletion: ") print(arr) pr...
This next example uses the -1 index to remove the last element in the array, which was one of the elements added in the previous section: example_array.pop(-1) print(example_array) 10 array('i', [2, 4, 6, 8]) The pop() method returns the value of the element that has been...
| Extends this array with datafromthe unicode string ustr.| The array must be a type'u'array; otherwise a ValueError|israised. Use array.fromstring(ustr.decode(...)) to|append Unicode data to an array of some other type.| |index(...)|index(x)| | Return index of first occurrence ...
remove(1) except ValueError: print('delete finished.') break print(arr) if __name__ == '__main__': delete_array_element() --- # count(x) Return the number of occurrences of x in the array. # 返回 x 在数组中出现的次数,没有该元素则返回0 arr = array('i', [1, 2, 45, 1,...
array('i', [2, 9, 3]) >>> a.pop()#默认删除索引为-1的元素,最后一个元素,如果传参数则按参数索引来删除元素. 3 >>> a array('i', [2, 9]) | Return the i-th elementanddelete itfromthe array. i defaults to -1.| |read(...)|fromfile(f, n)| ...
my_set={1,2,3,4,5}first_element=my_set.pop()print(first_element)# 输出: 随机的一个元素 1. 2. 3. 上述代码中,我们调用了pop()方法来获取my_set中的一个元素,并将其赋值给变量first_element。最后,我们打印出first_element的值,即为set中的第一个元素。
class Array: 定义数据结构 def __init__(self, capacity): self.array = [None] * capacity # 数组长度 self.size = 0 # 数组元素个数 插入数据 def insert(self, index, element): # index:插入的位置。element:插入的数 if index < 0 or index > self.size: raise Exception('越界') if self....
cars.pop(1) Try it Yourself » You can also use theremove()method to remove an element from the array. Example Delete the element that has the value "Volvo": cars.remove("Volvo") Try it Yourself » Note:The list'sremove()method only removes the first occurrence of the specified val...
['Hello', 'I love', 'Array', 1024, 'easy learning', 'DataStructure', 2020] >>> >>> test_list.pop(1) # 删除指定位置的元素 'I love' >>> test_list.remove(2020) # 删除指定元素 >>> >>> test_list.index('Hello') # 查找某个元素的索引值 ...