Python Errors and Debugging: Fix Bugs Faster
Every Python developer spends time debugging. The difference between spending minutes vs hours comes down to understanding error messages, knowing your debugging tools, and writing code that surfaces problems early. Python's exception system is rich and expressive -- learning to use it well transforms your development experience.
This path covers common errors and what causes them, error handling patterns, debugging tools and techniques, unit testing, edge case handling, and professional bug tracking workflows.
Common Errors
8 articlesPython Error Handling
try/except/finally, exception hierarchy, custom exceptions, and error handling best practices.
AttributeError: Object Has No Attribute
Why AttributeError occurs, common causes, and systematic approaches to fixing it.
TypeError: Unsupported Operand Type
Type mismatch errors, operator overloading, and ensuring type compatibility.
Why Is My Variable Not Defined?
NameError causes: scope issues, typos, import problems, and conditional definitions.
Why Is My List Changing Unexpectedly?
Mutable object aliasing, reference semantics, and defensive copying patterns.
Why Is My Loop Infinite?
Common causes of infinite loops and strategies to prevent and detect them.
Python Package Installation Errors
Troubleshooting pip, virtual environments, version conflicts, and platform-specific build failures.
Python Handling Edge Cases
Identifying, testing for, and handling edge cases that break seemingly correct code.
Debugging and Testing
7 articlesHow to Debug Python Code
Debugging techniques from print statements to pdb, IDE debuggers, and systematic bug isolation.
Avoid Code That Hides Bugs in Python
Anti-patterns that silently swallow errors and make debugging harder than it needs to be.
Clean Up Debugging Remnants in Python Code
Removing print statements, debug flags, and temporary code before production.
Python sys.breakpointhook
Customizing the breakpoint() function for different debugging environments.
PYTHONBREAKPOINT Environment Variable
Controlling debugger behavior with environment variables for different workflows.
Python Unit Testing: unittest and pytest Complete Guide
Writing and organizing tests with unittest and pytest, fixtures, mocking, and coverage.
Python Bug Tracking Systems
Integrating bug tracking into your development workflow for systematic issue management.