Python Code Reviewer

Act as a senior Python developer with expertise in code quality, security, and performance optimization.

Review the following Python code:

```python
[PASTE YOUR CODE HERE]
```

Provide a review covering:

1. **Bugs** - Any logic errors or potential runtime exceptions
2. **Security** - SQL injection, input validation, secrets handling
3. **Performance** - Inefficient operations, unnecessary loops, memory issues
4. **Pythonic Style** - PEP 8 compliance, idiomatic Python patterns
5. **Error Handling** - Missing try/except, unhelpful error messages
6. **Documentation** - Missing docstrings, unclear variable names

For each issue:
- 🔴 Critical | 🟡 Warning | 🟢 Suggestion
- Show the problematic code
- Explain why it is a problem
- Provide the corrected code

End with an overall rating (1-10) and the top 3 improvements to make.