Python list remove() - GeeksforGeeks

remove() is an inbuilt function in Python programming language that removes a given object from the list. It does not return any value.

Syntax:

list_name.remove(obj)

Parameters:

obj - object to be removed from the list

Returns:

 The method does not return any value 
but removes the given object from the list.

Note:It removes the first occurrence of the object from the list.
Code#1:

# Python3 program to demonstrate the use of  
# remove() method  
  
  
# the first occurrence of 1 is removed from the list  
list1 = [ 1, 2, 1, 1, 4, 5 ]  
list1.remove(1)  
print(list1)  
  
# removes 'a' from list2  
list2 = [ 'a', 'b', 'c', 'd' ]  
list2.remove('a')  
print(list2) 

Output:

[2, 1, 1, 4, 5]
['b', 'c', 'd']

Error:

It returns ValueError when the passed object 
is not present in the list

Code#2:

# Python3 program for the error in  
# remove() method  
  
  
# removes 'e' from list2  
list2 = [ 'a', 'b', 'c', 'd' ]  
list2.remove('e')  
print(list2) 

Output:

Traceback (most recent call last):
  File "/home/e35b642d8d5c06d24e9b31c7e7b9a7fa.py", line 8, in 
    list2.remove('e') 
ValueError: list.remove(x): x not in list

Practical Application:
Given a list, remove all the 1’s from the list and print the list.

Code#3:

# Python3 program for practical application 
# of removing 1 untill all 1 are removed from the list  
   
   
list1 = [1, 2, 3, 4, 1, 1, 1, 4, 5] 
  
# looping till all 1's are removed 
while (list1.count(1)): 
    list1.remove(1)  
      
print(list1)  

Output:

[2, 3, 4, 4, 5]

Given a list, remove all the 2’s from the list using in keyword
Code#4:

# Python3 program for practical application 
# of removing 2 until all 2 are removed from the list  
   
   
mylist = [1, 2, 3, 2, 2] 
  
# looping till all 2's are removed 
while 2 in mylist: mylist.remove(2)  
      
print(mylist)  

Output:

[1, 3]

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