Using the Array Module
To use arrays in Python, you need to import the array module and create an array.
Explanation of Code:
Arrays can only hold elements of the same type, specified by a type code.
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import array as arr2
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# Creating an integer array4
numbers = arr.array('i', [1, 2, 3, 4, 5])5
print(numbers) # Output: array('i', [1, 2, 3, 4, 5])Accessing Array Elements
You can access individual elements in an array using indexing.
Explanation of Code:
The index 0 accesses the first element, similar to lists.
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print(numbers[0]) # Output: 12
print(numbers[2]) # Output: 3Modifying Array Elements
Arrays are mutable, meaning you can change their elements after creation.
Explanation of Code:
You can modify elements by accessing them using their index.
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numbers[1] = 202
print(numbers) # Output: array('i', [1, 20, 3, 4, 5])Adding and Removing Elements
You can add elements to an array using the append() method and remove elements using the remove() method or the pop() method.
append()adds an element to the end of the array.remove()removes the first occurrence of a specified value.pop()removes an element at a specified index and returns it.
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numbers.append(6)2
print(numbers) # Output: array('i', [1, 20, 3, 4, 5, 6])3
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numbers.remove(20)5
print(numbers) # Output: array('i', [1, 3, 4, 5, 6])6
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removed_element = numbers.pop(2)8
print(removed_element) # Output: 49
print(numbers) # Output: array('i', [1, 3, 5, 6])Python Arrays Example Code
Explanation of Code:
This program creates arrays, accesses and modifies elements, adds and removes elements.
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import array as arr2
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# Using the array module4
# Creating an integer array5
numbers = arr.array('i', [1, 2, 3, 4, 5])6
print(numbers) # Output: array('i', [1, 2, 3, 4, 5])7
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# Accessing elements9
print(numbers[0]) # Output: 110
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# Modifying elements12
numbers[1] = 2013
print(numbers) # Output: array('i', [1, 20, 3, 4, 5])14
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# Adding and removing elements16
numbers.append(6)17
print(numbers) # Output: array('i', [1, 20, 3, 4, 5, 6])18
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numbers.remove(20)20
print(numbers) # Output: array('i', [1, 3, 4, 5, 6])21
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removed_element = numbers.pop(2)23
print(removed_element) # Output: 424
print(numbers) # Output: array('i', [1, 3, 5, 6])
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