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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

bookAccessing the Elements of a Set

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

  • Check for the existence of an element using the in keyword;
  • Iterate through the elements using a for loop.

Verifying Membership with in

The in keyword allows you to check if a specific element exists within a set:


              
123456

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False
copy

Iterating Through a Set with a for Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


              
1234567

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)
copy

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task
test

Swipe to show code editor

You will be working with a set of movies. First, use the in keyword to check if "Inception" is part of the collection. Print an appropriate message based on the result. Then, use a for loop to display all the movies in the set.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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Section 4. Chapter 4
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bookAccessing the Elements of a Set

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

  • Check for the existence of an element using the in keyword;
  • Iterate through the elements using a for loop.

Verifying Membership with in

The in keyword allows you to check if a specific element exists within a set:


              
123456

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False
copy

Iterating Through a Set with a for Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


              
1234567

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)
copy

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task
test

Swipe to show code editor

You will be working with a set of movies. First, use the in keyword to check if "Inception" is part of the collection. Print an appropriate message based on the result. Then, use a for loop to display all the movies in the set.

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 4. Chapter 4
toggle bottom row

bookAccessing the Elements of a Set

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

  • Check for the existence of an element using the in keyword;
  • Iterate through the elements using a for loop.

Verifying Membership with in

The in keyword allows you to check if a specific element exists within a set:


              
123456

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False
copy

Iterating Through a Set with a for Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


              
1234567

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)
copy

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task
test

Swipe to show code editor

You will be working with a set of movies. First, use the in keyword to check if "Inception" is part of the collection. Print an appropriate message based on the result. Then, use a for loop to display all the movies in the set.

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!

Because sets are unordered, you cannot access their elements by index like you would with a list or tuple. However, you can:

  • Check for the existence of an element using the in keyword;
  • Iterate through the elements using a for loop.

Verifying Membership with in

The in keyword allows you to check if a specific element exists within a set:


              
123456

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Check if specific movies are in the set
print("Inception" in movies)  # True
print("Avatar" in movies)     # False
copy

Iterating Through a Set with a for Loop

You can iterate over a set using a for loop to process each element individually. Since sets are unordered, the iteration order is unpredictable.


              
1234567

            
# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet", "Dunkirk", "Memento"}

# Iterate through the set and print each movie title
print("Movie collection:")
for movie in movies:
    print(movie)
copy

Each element in the set is accessed once during iteration. The order of elements in the output may vary.

Task
test

Swipe to show code editor

You will be working with a set of movies. First, use the in keyword to check if "Inception" is part of the collection. Print an appropriate message based on the result. Then, use a for loop to display all the movies in the set.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 4. Chapter 4
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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