Import Statements

Hello again, awesome learners! 🌟 Now, let's enhance our skills by exploring different ways to import these modules. Understanding the nuances of import statements can significantly streamline your coding process and make your code cleaner and more efficient.

Python offers several ways to import modules, each with its own use cases. Let's break them down:

Standard Import

This is the most straightforward method. You import an entire module and access its functions or variables using the module name as a prefix.


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import math
print(math.sqrt(16))  # Outputs: 4.0

Import with Aliases

If you find the module name long or if you want to avoid name conflicts, you can alias it to a shorter name.


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import numpy as np
print(np.array([1, 2, 3]))

From...Import Statement

This method allows you to import specific functions, classes, or variables from a module, making them accessible directly without the module name prefix.


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from datetime import datetime
print(datetime.now())

From...Import * Statement

Use this when you want to import everything from a module.

Caution: this can lead to unclear code and potential conflicts with names in other modules.


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from math import *
print(sqrt(25))  # Outputs: 5.0

Using Aliases

Aliases can help make your code more readable and manageable, especially when dealing with modules that have long names. Here's how you can create an alias:


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from matplotlib import pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6])
plt.show()

1. What is the correct way to import the `randint` function from the `random` module so that it can be used directly without a module prefix?

2. Consider the following statement: `import os as operating_system`. What would be the correct way to use the `getcwd()` function from the `os` module after this import?

We've now mastered importing modules and using aliases to tidy up our code. In the next chapter, we’ll explore the extensive Python standard libraries and see how they can be incorporated into our projects! Keep up the great energy! 🚀

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Seção 1. Capítulo 3