What are some examples of bad code in Python?

What are some examples of bad code in Python?

Bad code in Python can include things like using global variables excessively, not following PEP 8 style guidelines, or writing overly complex functions.

Can you give me a specific example of bad code?

Sure! Here's an example:

# Bad code example

def calculate_area(radius):
    area = 3.14 * radius * radius
    return area

print(calculate_area(5))

This code uses a magic number (3.14) instead of the math library's constant, which is less readable and maintainable.

What should I do to improve this code?

You can improve it by using the math module for better accuracy and readability:

import math

def calculate_area(radius):
    area = math.pi * radius ** 2
    return area

Are there any other common mistakes to avoid?

Yes, other common mistakes include not handling exceptions, using mutable default arguments, and writing functions that are too long.