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Python Data Structures
course content

Course Content

Python Data Structures

Python Data Structures

1. Mastering Python Lists
Creating Lists in Python: Declaring and Initializing ListsList Indexing in Python: Accessing Elements EfficientlyWorking with Nested Lists in PythonPython List Length: Measuring and Managing List SizeModifying Lists in Python: Updating and Changing ElementsUsing the append() Method: Adding Elements to ListsUsing the insert() Method: Placing Elements at Specific PositionsDeleting Elements in Python Lists: Removing Items SafelyUsing the remove() Method: Deleting Specific Elements from Lists
2. Mastering Python Dictionaries
Creating a Dictionary in Python: Storing Key-Value PairsAccessing Dictionary ValuesAccessing Dictionary KeysAdding Items to a Dictionary: Updating Key-Value PairsUsing the del Keyword: Removing Dictionary EntriesUsing the pop() Method: Deleting Elements with Return ValuesUsing the popitem() Method: Removing the Last Inserted ItemUsing the clear() Method: Emptying a Dictionary Completely
3. Mastering Python Tuples
Creating a Tuple in Python: Defining Immutable Data StructuresAccessing Elements in a Tuple: Indexing TechniqueConcatenating Tuples in Python: Merging Immutable SequencesDeleting Tuples in Python: Removing References to TuplesUpdating Tuples in PythonAdding Items to a Tuple: Alternative Approaches Using ListsCounting Elements in a Tuple: Using the count() MethodFinding Elements in a Tuple: Using the index() Method for Lookup
4. Mastering Python Sets
Creating a Set in Python: Defining Unordered CollectionsUsing the add() Method: Adding Single Elements to a SetUsing the update() Method: Merging Multiple Elements into a SetAccessing Elements in a Set: Iteration and Membership TestingUsing the remove() and discard() MethodsUsing the clear() Method: Removing All Elements from a Set

book
Accessing Elements in a Tuple: Indexing Technique

Accessing elements in a tuple is straightforward and works the same way as with lists. Simply specify the index number inside square brackets. Remember, indexing starts at 0, just like with lists.


              
1234567

            
movies = ("Inception", "Interstellar", "The Dark Knight", "Tenet", "Dunkirk", "Memento", "Following")

# Accessing the second movie
print(movies[1])

# Accessing the sixth movie
print(movies[5])
copy

Tuples also support negative indexing, where the indexing begins from the end. Thus, the last element has an index of -1, the second to last is -2, and so on.


              
1234567

            
movies = ("Inception", "Interstellar", "The Dark Knight", "Tenet", "Dunkirk", "Memento", "Following")

# Accessing the last movie
print(movies[-1])

# Accessing the fourth movie from the end
print(movies[-4])
copy

In the example above, we access the last element (indexed at -1) and the fourth element from the end (indexed at -4).

Task

Swipe to start coding

We are continuing to work with the tuple space_movies.

  • Get the first element of this tuple and store it in the variable first_movie.
  • Get the last element of the tuple and store it in the variable last_movie.
  • Initialize a new list favorite_movies and add these 2 movies to it.
  • Use indices to complete this task.

Solution

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Section 3. Chapter 2
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book
Accessing Elements in a Tuple: Indexing Technique

Accessing elements in a tuple is straightforward and works the same way as with lists. Simply specify the index number inside square brackets. Remember, indexing starts at 0, just like with lists.


              
1234567

            
movies = ("Inception", "Interstellar", "The Dark Knight", "Tenet", "Dunkirk", "Memento", "Following")

# Accessing the second movie
print(movies[1])

# Accessing the sixth movie
print(movies[5])
copy

Tuples also support negative indexing, where the indexing begins from the end. Thus, the last element has an index of -1, the second to last is -2, and so on.


              
1234567

            
movies = ("Inception", "Interstellar", "The Dark Knight", "Tenet", "Dunkirk", "Memento", "Following")

# Accessing the last movie
print(movies[-1])

# Accessing the fourth movie from the end
print(movies[-4])
copy

In the example above, we access the last element (indexed at -1) and the fourth element from the end (indexed at -4).

Task

Swipe to start coding

We are continuing to work with the tuple space_movies.

  • Get the first element of this tuple and store it in the variable first_movie.
  • Get the last element of the tuple and store it in the variable last_movie.
  • Initialize a new list favorite_movies and add these 2 movies to it.
  • Use indices to complete this task.

Solution

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 3. Chapter 2
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