How do I use the extend method in Python?

How do I use the extend method in Python?

The extend method in Python is used to add elements from an iterable (like a list) to the end of another list. For example, if you have a list a = [1, 2, 3] and you want to add elements from another list b = [4, 5], you can use a.extend(b).

Can you show me a code example?

Sure! Here's a simple example:

# Initial lists
list1 = [1, 2, 3]
list2 = [4, 5]

# Using extend method
list1.extend(list2)

print(list1)  # Output: [1, 2, 3, 4, 5]

What happens if I use extend with a string?

If you use extend with a string, it will add each character of the string as a separate element to the list. For example:

list1 = [1, 2]
list1.extend('abc')
print(list1)  # Output: [1, 2, 'a', 'b', 'c']

Is there a difference between extend and append?

Yes, there is a difference! The append method adds its argument as a single element to the end of the list, while extend adds each element of the iterable to the list. For example:

list1 = [1, 2]
list1.append([3, 4])
print(list1)  # Output: [1, 2, [3, 4]]