Python 06 Errors, Bugs and Comments #atharhashmisir #pythonprogramming #bca
2Writing Comments and Handling Error Messages in Python
1. Writing Comments in Python
Comments in Python are used to improve code readability and maintainability by providing explanations about the functionality or purpose of specific parts of the code. They are ignored during code execution.
Single-Line Comments: Use the # symbol to write a comment on a single line. These comments typically describe what the subsequent line or block of code does.
Multi-Line Comments: Python does not have a distinct multi-line comment syntax, but you can use triple quotes (''' or """) as a workaround to document multiple lines.
Proper commenting practices:
Write comments to explain why something is done, not just what is being done.
Keep comments concise but informative.
Update comments when the code changes to maintain accuracy.
2. Handling Error Messages in Python
Error messages in Python occur when the program encounters issues during execution. They can arise due to syntax errors, runtime errors, or logical issues. Proper error handling ensures that programs behave predictably even when something goes wrong.
Error Messages: Python provides detailed error messages that include:
The type of error (e.g., SyntaxError, ValueError).
The location in the code where the error occurred.
A description of the issue.
Handling Errors: Errors can be handled using try-except blocks, which allow the program to continue running or take alternative actions when an error occurs.
The try block contains code that might raise an exception.
The except block handles the exception if it occurs.
Optionally, you can use finally to execute code that must run regardless of whether an error occurs.
Key principles:
Use error handling to manage unexpected situations gracefully.
Log error messages or take corrective action to help in debugging.
Avoid overly broad exception handling, as it can mask genuine issues.