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Sample code for the article on variables
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‎python-variables/README.md

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# Variables in Python: Usage and Best Practices
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This folder provides the code examples for the Real Python tutorial [Variables in Python: Usage and Best Practices](https://realpython.com/python-variables/).

‎python-variables/colors.py

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colors: dict[str, str] = {
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"red": "#FF0000",
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"green": "#00FF00",
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"blue": "#0000FF",
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"yellow": "#FFFF00",
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"black": "#000000",
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"white": "#FFFFFF",
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}
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# colors: dict[str, tuple[int, int, int]] = {
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# "Red": (255, 0, 0),
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# "Green": (0, 255, 0),
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# "Blue": (0, 0, 255),
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# "Yellow": (255, 255, 0),
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# "Black": (0, 0, 0),
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# "White": (255, 255, 255),
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# }

‎python-variables/employees.py

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class Employee:
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count = 0
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def __init__(self, name, position, salary):
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self.name = name
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self.position = position
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self.salary = salary
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type(self).count += 1
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def display_profile(self):
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print(f"Name: {self.name}")
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print(f"Position: {self.position}")
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print(f"Salary: ${self.salary}")
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jane = Employee("Jane Doe", "Software Engineer", 90000)
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jane.display_profile()
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john = Employee("John Doe", "Product Manager", 120000)
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john.display_profile()
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print(f"Total employees: {Employee.count}")

‎python-variables/matrix.py

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matrix = [
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[9, 3, 8],
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[4, 5, 2],
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[6, 4, 3],
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]
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for i in matrix:
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for j in i:
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print(j)

‎python-variables/scopes.py

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def function():
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value = 42
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return value
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# Global scope
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global_variable = "global"
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def outer_func():
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# Nonlocal scope
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nonlocal_variable = "nonlocal"
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def inner_func():
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# Local scope
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local_variable = "local"
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print(f"Hi from the '{local_variable}' scope!")
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print(f"Hi from the '{global_variable}' scope!")
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print(f"Hi from the '{nonlocal_variable}' scope!")
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inner_func()
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outer_func()

‎python-variables/timeout.py

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_timeout = 30 # in seconds
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def get_timeout():
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return _timeout
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def set_timeout(seconds):
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global _timeout
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_timeout = seconds

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