KwickClips Python · 43 sec · free
What happens without header=None on a headerless file?
Short answer. The first row of data is wrongly used as the column names.
What does index_col=0 do?
It makes the first column the row labels.
Header and index
| Option | Use |
|---|---|
| header=None | no header |
| names=[...] | new names |
| index_col=0 | row labels |
Remember
| header=None with names=[...] |
| index_col=0 for row labels |
Your C S V has no header line. What now? Three options help. Header equals None keeps line one as data. Names gives column names. Index col makes a column the row labels. Two rules. Header None with names. Index col for row labels.
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
What does read_csv return?44 sec
Where does the Unnamed: 0 column come from?43 sec
How do you add a Total column?43 secVoice-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.