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What Is Difference Between Del, Remove and Pop on Python Lists?

  • Difficulty Level : Basic
  • Last Updated : 11 Dec, 2020

In python del is a keyword and remove(), pop() are in-built methods. The purpose of these three are same but the behavior is different remove() method delete values or object from the list using value and del and pop() deletes values or object from the list using an index.

del Keyword:

The del keyword delete any variable, list of values from a list. 

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Syntax:



del list_name[index]  # To delete single value
del list_name        # To delete whole list

Example:

Python3




# program to demonstrate use of del keyword
  
# assign list
numbers = [1, 2, 3, 2, 3, 4, 5]
  
# use del
del numbers[2]
  
# display list
print(numbers)
  
# use del
del numbers[-1]
  
# display list
print(numbers)
  
# use del
del numbers[0]
  
# display list
print(numbers)

Output:

[1, 2, 2, 3, 4, 5]
[1, 2, 2, 3, 4]
[2, 2, 3, 4]

remove() Method:

The remove() method removes the first matching value from the list.

Syntax:

list_name.remove(value)

Example:

Python3




# program to demonstrate use of remove() method
  
# assign list
numbers = [1, 2, 3, 2, 3, 4, 5]
  
# use remove()
numbers.remove(3)
  
# display list
print(numbers)
  
# use remove()
numbers.remove(2)
  
# display list
print(numbers)
  
# use remove()
numbers.remove(5)
  
# display list
print(numbers)

Output:

[1, 2, 2, 3, 4, 5]
[1, 2, 3, 4, 5]
[1, 2, 3, 4]

pop() Method:

The pop() method like del deletes value at a particular index. But pop() method returns deleted value from the list.

Syntax:

list_name.pop(index)

Example:

Python3




# program to demonstrate use of pop() method
  
# assign list
numbers = [1, 2, 3, 2, 3, 4, 5]
  
# use remove()
numbers.pop(3)
  
# display list
print(numbers)
  
# use remove()
numbers.pop(-1)
  
# display list
print(numbers)
  
# use remove()
numbers.pop(0)
  
# display list
print(numbers)

Output:

[1, 2, 3, 3, 4, 5]
[1, 2, 3, 3, 4]
[2, 3, 3, 4]

 del V/S remove() the V/Spop()

                 del                

           remove()          

                 pop()             

del is a keyword.It is a method.pop() is a method.
To delete value it uses the index.To delete value this method uses the value as a parameter.This method also uses the index as a parameter to delete.
The del keyword doesn’t return any value.The remove() method doesn’t return any value.pop() returns deleted value.
The del keyword can delete the single value from a list or delete the whole list at a time.At a time it deletes only one value from the list.At a time it deletes only one value from the list.
It throws index error in case of the index doesn’t exist in the list.It throws value error in case of value doesn’t exist in the list.It throws index error in case of an index doesn’t exist in the list.



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