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In this tutorial we will learn how to remove an element from a set in Python . Python set has 4 built-in methods to do it . They are as follows –

- Python Set pop() method
- Python Set remove() method
- Python Set discard() method
- Python Set clear() method

Let us have a look about all this methods with examples –

## Python Set pop() method

It removes and returns an arbitrary element from a given set . If the set is empty then it will raise `KeyError`

.

#### Syntax of pop() method

set.pop()

#### Parameters of pop() method

This method does not have any parameter .

#### Return type of pop() method

It returns the removed element .

### Examples of Python Set pop() method

#### Example 1: Remove an arbitrary element from a set in Python

```
# declaring a set
myset={"a","b","c","d","e"}
# deleting an arbitrary element
popped_element=myset.pop()
# printing the set
print(myset)
# Printing the removed element
print(popped_element)
```

{'b', 'a', 'c', 'e'} d

- In the above code first we have declared a set named
`myset`

as`{"a","b","c","d","e"}`

- Then we have removed an arbitrary element from the set using
`pop()`

method and stored the returned element to a`popped_element`

variable - Then we have printed the set and
`popped_element`

variable . - From the output we can see that an arbitrary element
`"d"`

is removed from the set .

#### Example 2: Try to remove an arbitrary element from an empty set

```
# declaring an empty set
myset=set()
# applying pop on the empty set
myset.pop()
```

---------------------------------------------------------------------------KeyErrorTraceback (most recent call last)C:\Users\RAJKUM~1\AppData\Local\Temp/ipykernel_5200/1066628389.pyin <module> 3 4# applying pop on the empty set----> 5myset.pop()KeyError: 'pop from an empty set'

In the above code as an empty set does not have any element so `pop()`

can not remove any arbitrary element from the set and raised `KeyError`

.

## Python Set remove() method

It removes an specified element from a given set . If the element is not found then it will raise `KeyError`

.

#### Syntax of remove() method

set.remove(element)

#### Parameters of remove() method

- element = It is the element which will be removed from the set . If the element is not found then it will raise
`KeyError`

#### Return type of remove() method

It returns `None`

.

### Examples of Python Set remove() method

#### Example 1: Remove a specified element from a set in Python

```
# declaring a set
myset={"a","b","c","d","e"}
# remove c from the set
myset.remove("c")
print(myset)
# remove d from the set
myset.remove("d")
print(myset)
# trying to remove c again
myset.remove("c")
```

{'d', 'b', 'a', 'e'} {'b', 'a', 'e'}

---------------------------------------------------------------------------KeyErrorTraceback (most recent call last)C:\Users\RAJKUM~1\AppData\Local\Temp/ipykernel_5200/771185309.pyin <module> 11 12# trying to remove c again---> 13myset.remove("c")KeyError: 'c'

- In the above code first we have declared a set named
`myset`

as`{"a","b","c","d","e"}`

- After that we have removed
`"c"`

from the set using`remove()`

method and printed the set . From the output we can see that`"c"`

is removed from the set . - Then we have removed
`"d"`

from the set using`remove()`

method and printed the set . - After that again we have tried to remove
`"c"`

from the set using`remove()`

method . As`"c"`

is not in the set so`remove()`

method raised`KeyError`

.

## Python Set discard() method

It removes an specified element from a given set . If the element is not found then it will not do anything.

#### Syntax of discard() method

set.discard(element)

#### Parameters of discard() method

- element = It is the element which will be removed from the set .

#### Return type of discard() method

It returns `None`

.

### Examples of Python Set discard() method

#### Example 1: Remove a specified element from a set in Python

```
# declaring a set
myset={"a","b","c","d","e"}
# remove c from the set
myset.discard("c")
print(myset)
# remove d from the set
myset.discard("d")
print(myset)
# trying to remove c again
myset.discard("c")
print(myset)
```

{'d', 'b', 'a', 'e'} {'b', 'a', 'e'} {'b', 'a', 'e'}

- In the above code first we have declared a set named
`myset`

as`{"a","b","c","d","e"}`

- After that we have removed
`"c"`

from the set using`discard()`

method and printed the set . From the output we can see that`"c"`

is removed from the set . - Then we have removed
`"d"`

from the set using`discard()`

method and printed the set . - After that again we have tried to remove
`"c"`

from the set using`discard()`

method and printed the set . As`"c"`

is not in the set so`discard()`

method has not done anything with the set .

## Python set remove vs discard

Previously we have learn about python set `remove()`

and python set discard`()`

method . The main difference between Python set remove vs discard is If the element we want to remove from the set is not found then `remove()`

will raise `KeyError`

but `discard()`

will not raise any error .

## Python Set clear() method

It removes all elements from a given set .

#### Syntax of clear() method

set.clear()

#### Parameters of clear() method

This method does not have any parameter .

#### Return type of clear() method

It returns `None`

.

### Examples of Python Set clear() method

#### Example 1: Remove all elements from a set in Python

```
# declaring a set
myset={"a","b","c","d","e"}
# remove all elements from the set
myset.clear()
# printing the set
print(myset)
```

set()

- In the above code first we have declared a set named
`myset`

as`{"a","b","c","d","e"}`

- Then we have removed all elements from the set using
`clear()`

method . - After that we have printed the set . From the output we can see that an empty set is printed .

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