# remove() method in list - Python

• It is used to remove the first occurrences of an element from a list.
• The`.remove()` method takes exactly one argument and it doesn’t return anything.
• It will throw an error if the element is not found in the list.
• When we call the `.remove()` method with a list and pass an element as an argument it first iterates over the elements of the list and finds the passed element, if an element is found it removes the element from the list if not found then it will throw an error `ValueError`.
• The time complexity of the `.remove()` method is O(n).

Syntax –

`list.remove(element)`

Parameter –

• element → an element that you want to remove from the list.
• return → None(it doesn’t return anything)

Example –

```				```
my_list=[20,40,60,80,100]
print("Original list:",my_list)
my_list.remove(60)
print("Modified Original list:",my_list)

# Output -
# Original list: [20, 40, 60, 80, 100]
# Modified Original list: [20, 40, 80, 100]
```
```
• In the above example, first we create a list with some elements and store it in the my_list variable.
• After creating the list print the list on the output screen.
• Then remove 60 from the my_list using the `.remove()` method.
• Finally, print the Modified original list on the output screen.

Example 2- Removes the element from the list based on the condition

```				```
# remove all odd elements from a list
my_list=[1,2,3,4,5,6,7,8,9,10]
print("Original list:",my_list)
i=0
while i<len(my_list):
if my_list[i]%2:
my_list.remove(my_list[i])
else:
i=i+1
print("Modified list:",my_list)

# Output -
# Original list: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
# Modified list: [2, 4, 6, 8, 10]
```
```

💡 We do not use `.remove()` method inside a for loop because for loop runs in the range of list or size of list and when we use `.remove()` method it will affect the range of list.

Example 3- Removes all duplicate elements from the list

```				```
lst=['a','b','c','d','a','a','e','f']
print("Original list:",lst)
i=0
while (i<lst.count('a')-1):
lst.remove('a')
print("Modified Original list:",lst)

# Output -
# Original list: ['a', 'b', 'c', 'd', 'a', 'a', 'e', 'f']
# Modified Original list: ['b', 'c', 'd', 'a', 'e', 'f']
```
```

Example 4- Remove a list from a list

```				```
my_list=['hello','Python','remove',['edSlash','official']]
print("Original list:",my_list)
my_list.remove(['edSlash','official'])
print("Modified Original list:",my_list)

# Output -
# Original list: ['hello', 'Python', 'remove', ['edSlash', 'official']]
# Modified Original list: ['hello', 'Python', 'remove']
```
```

Example 5- Remove an element that doesn’t exist

```				```
my_list=['hello','Students','this','is','edSlash']
print("Original List :",my_list)
my_list.remove('anurag')
print("\nModified Original List:",my_list)

# Output -
# Original List : ['hello', 'Students', 'this', 'is', 'edSlash']
# Traceback (most recent call last):
# File "/home/main.py", line 3, in <module>
# my_list.remove('anurag')
# ValueError: list.remove(x): x not in list
```
```