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
Updating Tuples in Python
To modify values within a tuple, you can use a technique similar to the one for deletion. Because a tuple is immutable, you can't directly alter its elements without encountering an error.
movie_ratings = (8.8, 9.0, 7.5, 6.8) # Attempting to modify a tuple directly movie_ratings[1] = 8.9 # Output: Error: 'tuple' object does not support item assignment
However, by converting the tuple to a list, you can easily make the desired changes.
current_movies = ("Inception", "Interstellar", "Tenet", "Dunkirk") # Step 1: Convert the tuple to a list movies_list = list(current_movies) # Step 2: Update the second and third movie titles movies_list[1] = "Memento" movies_list[2] = "The Prestige" # Step 3: Convert the list back to a tuple current_movies = tuple(movies_list) print(current_movies)
Uppgift
Swipe to start coding
You are given a new tuple containing genres, called movie_genres.
- Convert the tuple into a list and assign it to the variable
temp_list. - Replace the element
"Drama"with"Thriller". - Replace the element
"Horror"with"Adventure". - Convert the list back into a tuple and assign the value to the variable
movie_genres. - Delete the temporary list.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanVar allt tydligt?
Tack för dina kommentarer!
Avsnitt 3. Kapitel 5
Updating Tuples in Python
To modify values within a tuple, you can use a technique similar to the one for deletion. Because a tuple is immutable, you can't directly alter its elements without encountering an error.
movie_ratings = (8.8, 9.0, 7.5, 6.8) # Attempting to modify a tuple directly movie_ratings[1] = 8.9 # Output: Error: 'tuple' object does not support item assignment
However, by converting the tuple to a list, you can easily make the desired changes.
current_movies = ("Inception", "Interstellar", "Tenet", "Dunkirk") # Step 1: Convert the tuple to a list movies_list = list(current_movies) # Step 2: Update the second and third movie titles movies_list[1] = "Memento" movies_list[2] = "The Prestige" # Step 3: Convert the list back to a tuple current_movies = tuple(movies_list) print(current_movies)
Uppgift
Swipe to start coding
You are given a new tuple containing genres, called movie_genres.
- Convert the tuple into a list and assign it to the variable
temp_list. - Replace the element
"Drama"with"Thriller". - Replace the element
"Horror"with"Adventure". - Convert the list back into a tuple and assign the value to the variable
movie_genres. - Delete the temporary list.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanVar allt tydligt?
Tack för dina kommentarer!
Avsnitt 3. Kapitel 5
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan