CBSE 2026 results are out, Mukul scored a perfect 100/100 in Computer ScienceSee all toppers →

KwickClips Python · 43 sec · free

Where does the Unnamed: 0 column come from?

Short answer. The index that to_csv saved as a first column.

What is the fix?

Save with index=False.

Remember

to_csv() writes the index too
index=False skips it

You saved a file, read it back, and got Unnamed zero. Why? To C S V saves the DataFrame. By default it also saves the index. Add index equals False to skip it. Two rules. To C S V writes the index too. Index equals False skips it.

This clip is from the full lesson: Importing and Exporting CSV with Pandas — 8 minutes, with the tables, the quick answers and the whole lesson in text.

Useful for: CBSE Class 12 Informatics Practices (065), CBSE Class 12 Informatics Practices (065), CBSE Class 12 Artificial Intelligence (843)

More KwickClips from this lesson

Voice-over is AI-generated; the script is written and checked by Kajal Ma'am. Confirm anything you plan around against your official board document. We never ask for a password or an OTP.

Want a plan that actually fits your board dates?

Ask Kajal Ma'am directly, 20+ years teaching computer science. Free demo class first, no payment.

Talk to Kajal Ma'am on WhatsApp

Or see the Class 12 Computer Science course →

Studying outside India?

We coach CBSE, IGCSE & international students across the globe, one-to-one, in your local time zone.

Visit International →