# Python Set remove() Method – Tutorial with Examples

A set is an unordered collection of unique elements in Python. One of the built-in methods provided by Python for manipulating sets is the `remove()` method. The `remove()` method is used to remove a specific element from the set.

## Syntax

```set.remove(element)
```

The `remove()` method takes one argument, which is the element to be removed from the set. If the element is not found in the set, it will raise a `KeyError`.

## Return Value

The `remove()` method does not return any value. It just removes the specified element from the set.

## Examples

### Example 1: Using remove() method to remove an element from a set

Let’s create a set and use the `remove()` method to remove a specific element:

```# Create a set
set1 = {1, 2, 3, 4, 5}
# Remove an element from the set
set1.remove(3)

# Print the set after removing the element
print(set1)
```

Output:

`{1, 2, 4, 5}`

In the above example, we created a set (`set1`) and used the `remove()` method to remove the element 3. After removing the element, the set contained the remaining elements (1, 2, 4, and 5).

### Example 2: Using remove() method on a non-existent element

Let’s try to use the `remove()` method to remove an element that does not exist in the set:

```# Create a set
set2 = {1, 2, 4, 5}
# Try to remove a non-existent element from the set
set2.remove(3)

# Print the set after trying to remove the element
print(set2)
```

Output:

`KeyError: 3`

In the above example, we created a set (`set2`) and tried to use the `remove()` method to remove the element 3. However, since the element did not exist in the set, the method raised a `KeyError`.

### Example 3: Using remove() method in a loop to remove specific elements

We can use the `remove()` method to remove specific elements from a set in a loop:

```# Create a set
set3 = {1, 2, 3, 4, 5}
# Remove specific elements from the set
for element in [2, 4]:
set3.remove(element)
print("Set after removing", element, ":", set3)
```

Output:

```Set after removing 2 : {1, 3, 4, 5}
Set after removing 4 : {1, 3, 5}
```

In the above example, we created a set (`set3`) and used the `remove()` method to remove specific elements (2 and 4) from the set in a loop. After removing each element, we printed the set to show the remaining elements. Note that the elements are removed in the order that they appear in the loop.

## Use Cases

The `remove()` method is useful when we want to remove a specific element from a set. Some use cases include:

• Removing duplicate elements from a set
• Removing elements based on a specific condition
• Filtering elements in a set

Overall, the `remove()` method is a powerful tool for manipulating sets in Python.