Kursinnehåll
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
Using the popitem() Method: Removing the Last Inserted Item
Dictionaries also have a popitem() method that removes and returns the last key-value pair.
book = { "title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813, "genre": "Romance" } # Removing the last key-value pair using popitem() popped_item = book.popitem() # Printing the updated dictionary and the removed pair print("Removed item:", popped_item) print("Updated dictionary:", book)
Uppgift
Swipe to start coding
You are given the dictionary authors_books.
- Remove the last element from the dictionary.
- Add a new element with the key
'Mark Twain'and the value['The Adventures of Tom Sawyer', 'Adventures of Huckleberry Finn', 'The Prince and the Pauper']. - Use the
popitem()method to remove the last element.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanVar allt tydligt?
Tack för dina kommentarer!
Avsnitt 2. Kapitel 7
Using the popitem() Method: Removing the Last Inserted Item
Dictionaries also have a popitem() method that removes and returns the last key-value pair.
book = { "title": "Pride and Prejudice", "author": "Jane Austen", "year": 1813, "genre": "Romance" } # Removing the last key-value pair using popitem() popped_item = book.popitem() # Printing the updated dictionary and the removed pair print("Removed item:", popped_item) print("Updated dictionary:", book)
Uppgift
Swipe to start coding
You are given the dictionary authors_books.
- Remove the last element from the dictionary.
- Add a new element with the key
'Mark Twain'and the value['The Adventures of Tom Sawyer', 'Adventures of Huckleberry Finn', 'The Prince and the Pauper']. - Use the
popitem()method to remove the last element.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanVar allt tydligt?
Tack för dina kommentarer!
Avsnitt 2. Kapitel 7
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan