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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
Using the pop() Method: Deleting Elements with Return Values

The pop() method in Python dictionaries allows you to remove a key-value pair based on its key and returns the corresponding value. This method is particularly useful when you need to extract and process a value while simultaneously removing it from the dictionary.

The syntax is:


              
123456789101112

            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813,
    "copies": 5
}

# Remove the 'copies' key and retrieve its value
removed_copies = book.pop("copies")

print("Updated dictionary:", book)
print("Removed value:", removed_copies)
copy

If the key does not exist in the dictionary, Python raises a KeyError exception.


              
12345678

            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813
}

# Attempting to remove a non-existent key
removed_genre = book.pop("genre")
copy
Task

Swipe to start coding

You are given the same dictionary authors_books.

  • Remove "Stephen King"'s books from the dictionary and save them in the variable kings_books.
  • Use the pop() method to accomplish this.

Solution

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Section 2. Chapter 6
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book
Using the pop() Method: Deleting Elements with Return Values

The pop() method in Python dictionaries allows you to remove a key-value pair based on its key and returns the corresponding value. This method is particularly useful when you need to extract and process a value while simultaneously removing it from the dictionary.

The syntax is:


              
123456789101112

            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813,
    "copies": 5
}

# Remove the 'copies' key and retrieve its value
removed_copies = book.pop("copies")

print("Updated dictionary:", book)
print("Removed value:", removed_copies)
copy

If the key does not exist in the dictionary, Python raises a KeyError exception.


              
12345678

            
book = {
    "title": "Pride and Prejudice",
    "author": "Jane Austen",
    "year": 1813
}

# Attempting to remove a non-existent key
removed_genre = book.pop("genre")
copy
Task

Swipe to start coding

You are given the same dictionary authors_books.

  • Remove "Stephen King"'s books from the dictionary and save them in the variable kings_books.
  • Use the pop() method to accomplish this.

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 2. Chapter 6
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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