Скачать или смотреть How to Declare and Add Items to an Array in Python

Summary: Learn how to declare arrays and add items to them in Python using different methods and libraries such as lists and the array module.
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In Python, arrays are used to store multiple values in a single variable. While Python does not have built-in support for arrays in the same way languages like Java or C++ do, it uses lists or the array module to handle array-like data structures. This guide will show you how to declare arrays and add items to them using both lists and the array module.

Declaring an Array Using Lists

In Python, the most common way to handle arrays is by using lists. Lists are flexible, can store different data types, and are dynamic, meaning their size can change as needed.

Declaring a List

To declare a list in Python, use square brackets [] and separate each item with a comma.

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Adding Items to a List

You can add items to a list using various methods:

Using append()

The append() method adds a single item to the end of the list.

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Using insert()

The insert() method adds an item at a specified position.

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Using extend()

The extend() method adds multiple items to the end of the list.

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Declaring an Array Using the array Module

For performance or type-specific arrays, you can use the array module, which is more similar to arrays in C or Java. The array module provides a way to create arrays that are more efficient in terms of memory and performance.

Importing the array Module

To use the array module, you need to import it first.

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Declaring an Array

To declare an array, you need to specify the type code (which indicates the data type) and the initial items.

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Adding Items to an Array

You can add items to an array using similar methods as lists:

Using append()

The append() method adds a single item to the end of the array.

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Using insert()

The insert() method adds an item at a specified position.

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Using extend()

The extend() method adds multiple items to the end of the array.

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Conclusion

In Python, arrays can be managed using lists or the array module, depending on your needs. Lists are more versatile and easier to use for general purposes, while the array module provides more performance-oriented and type-specific arrays. By using the methods described above, you can effectively declare and add items to arrays in Python.