Quick Answer

Handle invalid division operations.

Understanding the Issue

ZeroDivisionError occurs when attempting to divide by zero, which is mathematically undefined. This can happen in regular division (/) or floor division (//). The error often surfaces in dynamic calculations where denominators aren't properly validated.

The Problem

This code demonstrates the issue:

Python Error 
def calculate_ratio(a, b):
    return a / b  # Fails if b=0

average = total / count  # Fails if count=0

The Solution

Here's the corrected code:

Python Fixed 
# Solution 1: Explicit check
def safe_division(a, b):
    if b == 0:
        return float('nan')  # or raise custom error
    return a / b

# Solution 2: Try/except
try:
    result = numerator / denominator
except ZeroDivisionError:
    result = 0

Key Takeaways

Always validate denominators in division operations.