5 Anti-Patterns Beginners Write

Short summary

This guide covers five common Python coding anti-patterns beginners write: excessive function parameters, type comparison with == instead of isinstance(), unnecessary else blocks after returns, deep nesting instead of early returns, and mutating lists during iteration. Each includes a concrete before/after fix. Applying these five changes elevates code quality and prevents subtle bugs.

• •Five specific anti-patterns with code examples and fixes
• •Practical improvements immediately applicable to existing codebases
• •Changes distinguish junior from senior-level code quality

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