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Questions and Answers
Which statement can be used to remove an item from a list given its index instead of its value?
Which statement can be used to remove an item from a list given its index instead of its value?
- The remove() method
- The pop() method
- The clear() method
- The delete() statement (correct)
What are two examples of sequence data types in Python?
What are two examples of sequence data types in Python?
- Arrays and tuples
- Tuples and strings (correct)
- Lists and dictionaries
- Sets and ranges
What can the clear() method be used for?
What can the clear() method be used for?
- Deleting entire variables
- Clearing the entire list (correct)
- Removing an item from a list by index
- Removing slices from a list
Which method returns a value when removing an item from a list?
Which method returns a value when removing an item from a list?
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What is an error when referencing a variable after removing it using the delete() statement?
What is an error when referencing a variable after removing it using the delete() statement?
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Study Notes
List Manipulation in Python
- Use the
delstatement to remove an item from a list by specifying its index. - Example of
del list[index]operates directly on the list by removing the element located at that specific index.
Sequence Data Types
- Two key examples of sequence data types in Python are:
- Lists: Mutable sequences that can hold a collection of items.
- Tuples: Immutable sequences that can store a collection of items but cannot be changed after creation.
Clearing Lists
- The
clear()method is utilized to remove all items from a list, resulting in an empty list.
Removing Items with Return Values
- The
pop()method removes an item from a list at a given index and returns its value. - If no index is specified,
pop()removes and returns the last item in the list.
Reference Errors After Deletion
- An error occurs when attempting to reference a variable after it has been deleted using the
delstatement, leading to aNameErrorindicating that the variable is not defined.
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