How do I remove an element from a list by index in Python

Question

Removing specific elements from a list

Comments

Use del and specify the index of the element you want to delete.

Answer 1

You can use the pop() method to remove specific elements of a list.

EXAMPLE:

a=[1,2,3,4,5,5]
a.pop(2)

OUTPUT:  3

pop() method takes the index value as a parameter and removes the element at the specified index. Therefore, a[2] contains 3 and pop() removes and returns the same as output. You can also use negative index values.

EXAMPLE:

a=[1,2,3,4,5,5]
a.pop(-1)

OUTPUT:  5

Hope it helps!!

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Thanks!

Answer 2

Delete the List and its element:

We have multiple functions for deleting the List’s element with different functionality. 

• del function helps to delete the list variable from code.
• pop function helps to delete the individual element according to positioning of the list. Return the position value.
• remove function helps to delete the first occurrence of the number or string mentioned in its arguments.
• Clear function clear the all elements present in the list without delete its variable.
• #Program:
  >>> a=[1,2,3,4,5,"sahil"]
  >>> a.pop(0)# delete element at position 0
  1
  >>> a
  [2, 3, 4, 5, 'sahil']
  >>> a.remove(2)# delete element 2 that present at 0 position
  >>> a
  [3, 4, 5, 'sahil']
  >>> del a[1:3] # delete multiple elements from list at position 1 to 2
  >>> a
  [3, 'sahil']
  >>> a.clear()# clear the list
  >>> a
  []
  >>> del a #delete the variable a
  >>> a
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
  NameError: name 'a' is not defined

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Answer 3

The simplest approach is to use list's pop([i]) method which removes an element present at the specified position in the list. If we don't specify any index, pop() removes and returns the last element in the list. The pop([i]) method raises an IndexError if the list is empty as it tries to pop from an empty list.

Use a for-loop to remove multiple items from a list. Use a for-loop to iterate through the original list. Use if element not in the list to check if the element is not in the list of elements to remove list. If it is not, use the list.

Answer 4

1886

Use del and specify the index of the element you want to delete:

>>> a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> del a[-1]
>>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8]

Also supports slices:

>>> del a[2:4]
>>> a
[0, 1, 4, 5, 6, 7, 8, 9]