In Python, a list is a variable data type that supports adding, deleting, and modifying its elements. Here are detailed examples of using code to implement these operations:
Add elements
1. Use the append() method to add an element at the end of the list
# Define an initial listfruits = ["apple", "banana", "cherry"]
print("Initial List:", fruits)
# Add elements using the append() method("date")
print("use append() List after adding elements:", fruits)2. Use the extend() method to add all elements in an iterable object to the end of the list
# Define an initial listfruits = ["apple", "banana", "cherry"]
new_fruits = ["elderberry", "fig"]
# Add elements using extend() method(new_fruits)
print("use extend() List after adding elements:", fruits)3. Use the insert() method to insert an element at the specified index position
# Define an initial listfruits = ["apple", "banana", "cherry"]
# Use insert() method to insert elements at index 1(1, "avocado")
print("use insert() List after adding elements:", fruits)Delete elements
1. Use the del statement to delete elements based on the index
# Define an initial listfruits = ["apple", "banana", "cherry", "date"]
print("Initial List:", fruits)
# Use the del statement to delete elements with index 2del fruits[2]
print("Delete the list of elements with del:", fruits)2. Use the remove() method to delete elements based on element values
# Define an initial listfruits = ["apple", "banana", "cherry", "banana"]
# Use the remove() method to delete the first element with the value "banana"("banana")
print("use remove() List after deleting elements:", fruits)3. Use the pop() method to delete and return the element at the specified index position (the last element is deleted by default)
# Define an initial listfruits = ["apple", "banana", "cherry"]
# Use pop() method to delete the last elementlast_fruit = ()
print("use pop() Deleted elements:", last_fruit)
print("use pop() List after deleting elements:", fruits)
# Use the pop() method to delete elements at the specified index positionfirst_fruit = (0)
print("use pop() Deleted elements:", first_fruit)
print("再次use pop() List after deleting elements:", fruits)Modify elements
Elements in the list can be modified directly through the index.
# Define an initial listfruits = ["apple", "banana", "cherry"]
print("Initial List:", fruits)
# Modify the element with index 1fruits[1] = "blueberry"
print("Modified list of elements:", fruits)These examples show how to add, delete, and modify list elements in Python. You can choose the right method according to your specific needs.
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