On Error resume next was the first thing I learned in my first job

TL;DR: Don't avoid exceptions. Handle Them.

Problems

• Fail Fast Principle Violation

Solutions

1. Catch the exception and deal with it explicitly

Context

On early programming days, we privileged the systems running before error handling.

We have evolved.

Sample Code

Wrong

# badimport loggingdef send_email():   print("Sending email")   raise ConnectionError("Oops")try:  send_email() except:   # AVOID THISpass

Right

import logginglogger logging.getLogger(__name___)try:  send_email()except ConnectionError as exc:  logger.error(f"Cannot send email {exc}")

Detection

[X] Automatic

Many linters warn us on empty exception blocks

Exceptions

If we need to skip and ignore the exception, we should document it explicitly.

Tags

• Exceptions

Conclusion

Prepare to deal with the errors.

Even if you decide to do nothing, you should be explicit with this decision.

Relations

Code Smell 132 - Exception Try Too Broad

Maxi Contieri May 18 2 min read

#python #programming #cleancode #webdev

More Info

Fail Fast

Maxi Contieri Dec 6 '20 6 min read

#codenewbie #programming #webdev #oop

On Error Resume Next Package

Disclaimer

Code Smells are just my opinion.

Credits

Photo by James Best on Unsplash

Thank you @Jan Giacomelli

Jan Giacomelli

@jangiacomelli

@mcsee1 @testdrivenio You sure can

13:19 PM - 17 Sep 2022

Optimization hinders evolution. Everything should be built top-down, except the first time. Simplicity does not precede complexity, but follows it.

Alan Perlis

Software Engineering Great Quotes

Maxi Contieri Dec 28 '20 13 min read

#codenewbie #programming #quotes #software

This article is part of the CodeSmell Series.

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