Python Data Analysis | Data Science Tutorials #6 NAN Null Values
Python Sentinel Objects: Stop Using None Like This
Use of True, False, and None as return values in Python functions
Why I Explicitly Return “None” In All My Functions (Python)
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Last Updated: September 25, 2026
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This tutorial covers the basics of Start your software dev career - calcur.tech/dev-fundamentals FREE Courses (100+ hours) ... Become part of the top 3% of the developers by applying to Toptal topt.al/25cXVn -- Music by Eric Matyas ... This is why I explicitly return