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Python Data Structures
course content

Course Content

Python Data Structures

Python Data Structures

1. List
Creating a ListList IndexingNested ListList LengthModifying a ListThe append() MethodThe insert() MethodDeleting ElementsThe remove() MethodList ComprehensionsList Comprehansions with Conditions
2. Dictionary
Creating a DictionaryAccessing Dictionary ValuesAccessing Dictionary KeysAdding ItemsChallenge: Expand the DictionaryThe del KeywordThe pop() MethodThe popitem() MethodThe clear() MethodDictionary ComprehensionsDictionary Comprehension with Condition
3. Tuple
Creating a Tuple Accessing Elements in a TupleConcatenating TuplesDeleting a TupleUpdating a TupleAdding Items to a TupleCounting Elements in a TupleFinding Elements in a Tuple
4. Set
Creating a SetThe add() MethodThe update() MethodAccessing the Elements of a SetThe remove() and discard() MethodsThe clear() Method

bookThe remove() Method

The remove() method deletes the first occurrence of a specific value in the list. This is particularly useful when you know the element's value but not its index.

The syntax of remove() method is:

Now, you decide to remove "Kyoto" from your list because you've already visited it. Here's how you can do it:


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Kyoto", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # Output: ['Paris', 'Oslo', 'Sydney']
copy

If "Kyoto" isn't on the list, this code will raise an error.


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # ValueError: list.remove(x): x not in list
copy

To avoid this, you can check if the city exists before removing it:


              
123456

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

if "Kyoto" in travel_wishlist:
    travel_wishlist.remove("Kyoto")

print(travel_wishlist)
copy

Note

With the remove() method, you can only take out one item at a time.

Task
test

Swipe to show code editor

You changed your mind about one of the cities. Use the remove() method to delete Oslo from the travel_wishlist.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 9
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bookThe remove() Method

The remove() method deletes the first occurrence of a specific value in the list. This is particularly useful when you know the element's value but not its index.

The syntax of remove() method is:

Now, you decide to remove "Kyoto" from your list because you've already visited it. Here's how you can do it:


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Kyoto", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # Output: ['Paris', 'Oslo', 'Sydney']
copy

If "Kyoto" isn't on the list, this code will raise an error.


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # ValueError: list.remove(x): x not in list
copy

To avoid this, you can check if the city exists before removing it:


              
123456

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

if "Kyoto" in travel_wishlist:
    travel_wishlist.remove("Kyoto")

print(travel_wishlist)
copy

Note

With the remove() method, you can only take out one item at a time.

Task
test

Swipe to show code editor

You changed your mind about one of the cities. Use the remove() method to delete Oslo from the travel_wishlist.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 9
toggle bottom row

bookThe remove() Method

The remove() method deletes the first occurrence of a specific value in the list. This is particularly useful when you know the element's value but not its index.

The syntax of remove() method is:

Now, you decide to remove "Kyoto" from your list because you've already visited it. Here's how you can do it:


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Kyoto", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # Output: ['Paris', 'Oslo', 'Sydney']
copy

If "Kyoto" isn't on the list, this code will raise an error.


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # ValueError: list.remove(x): x not in list
copy

To avoid this, you can check if the city exists before removing it:


              
123456

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

if "Kyoto" in travel_wishlist:
    travel_wishlist.remove("Kyoto")

print(travel_wishlist)
copy

Note

With the remove() method, you can only take out one item at a time.

Task
test

Swipe to show code editor

You changed your mind about one of the cities. Use the remove() method to delete Oslo from the travel_wishlist.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

The remove() method deletes the first occurrence of a specific value in the list. This is particularly useful when you know the element's value but not its index.

The syntax of remove() method is:

Now, you decide to remove "Kyoto" from your list because you've already visited it. Here's how you can do it:


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Kyoto", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # Output: ['Paris', 'Oslo', 'Sydney']
copy

If "Kyoto" isn't on the list, this code will raise an error.


              
12345

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

# Remove a specific city
travel_wishlist.remove("Kyoto")
print(travel_wishlist)  # ValueError: list.remove(x): x not in list
copy

To avoid this, you can check if the city exists before removing it:


              
123456

            
travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"]

if "Kyoto" in travel_wishlist:
    travel_wishlist.remove("Kyoto")

print(travel_wishlist)
copy

Note

With the remove() method, you can only take out one item at a time.

Task
test

Swipe to show code editor

You changed your mind about one of the cities. Use the remove() method to delete Oslo from the travel_wishlist.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 1. Chapter 9
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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