What are some common methods for manipulating arrays in Python?

What are some common methods for manipulating arrays in Python?

In Python, common methods for manipulating arrays include append(), extend(), insert(), remove(), and pop(). Would you like examples of these?

Yes, please provide examples for each method.

Sure!

1. append(): Adds an element to the end of the array.

   arr = [1, 2, 3]
   arr.append(4)  # arr becomes [1, 2, 3, 4]
   

2. extend(): Adds elements from another array.

   arr.extend([5, 6])  # arr becomes [1, 2, 3, 4, 5, 6]
   

3. insert(): Inserts an element at a specified position.

   arr.insert(1, 10)  # arr becomes [1, 10, 2, 3, 4, 5, 6]
   

4. remove(): Removes the first occurrence of a value.

   arr.remove(10)  # arr becomes [1, 2, 3, 4, 5, 6]
   

5. pop(): Removes and returns an element at a given index (default is the last).

   last_element = arr.pop()  # last_element is 6, arr becomes [1, 2, 3, 4, 5]
   

Let me know if you need more details!

What about slicing arrays?

Slicing in Python allows you to access a subset of an array. You can use the syntax array[start:end:step]. For example:

arr = [0, 1, 2, 3, 4, 5]
subset = arr[1:4]  # subset becomes [1, 2, 3]

You can also use negative indices to slice from the end of the array!