L 23: ARRAYS IN PYTHON | ARRAY OPERATIONS IN PYTHON | PYTHON TUTORIALS FOR BEGINNERS
The array module allows us to store a collection of numeric values.
Creating Python Arrays:
To create an array of numeric values, we need to import the array module. For example:
import array as arr
a = arr.array('d', [1.1, 3.5, 4.5])
print(a)
Accessing Python Array Elements:
We use indices to access elements of an array.
import array as arr
a = arr.array('i', [2, 4, 6, 8])
print("First element:", a[0])
print("Second element:", a[1])
print("Last element:", a[-1])
Slicing Python Arrays:
We can access a range of items in an array by using the slicing operator :
import array as arr
numbers_list = [2, 5, 62, 5, 42, 52, 48, 5]
numbers_array = arr.array('i', numbers_list)
print(numbers_array[2:5]) # 3rd to 5th
print(numbers_array[:-5]) # beginning to 4th
print(numbers_array[5:]) # 6th to end
print(numbers_array[:]) # beginning to end
Changing and Adding Elements:
Arrays are mutable; their elements can be changed in a similar way as lists.
import array as arr
numbers = arr.array('i', [1, 2, 3, 5, 7, 10])
changing first element
numbers[0] = 0
print(numbers) # Output: array('i', [0, 2, 3, 5, 7, 10])
changing 3rd to 5th element
numbers[2:5] = arr.array('i', [4, 6, 8])
print(numbers) # Output: array('i', [0, 2, 4, 6, 8, 10])
Removing Python Array Elements:
We can delete one or more items from an array using Python's del statement.
#ARRAY #PYTHON #PARNIKATUTORIALS
00:00 Introduction
00:29 Limitation of a variable
01:21 What is an array
02:15 How to import array module
05:19 How to compute length of an array
09:26 How to add elements in an array
14:25 How to remove elements in an array
17:26 How to concatenate two arrays
19:37 Slicing in an array
22:15 Displaying elements in an array
26:16 Implementation in Jupyter Notebook
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