Removing first (default) column in pandas dataframe

Question

I am new to pandas, and I have a dataframe (which I get after processing) that looks like this:

I was unable to find any help/info regarding how can I remove the first column (row_number/ index) to make it like this:

Any help would be appreciated.

Edit: additional question example:

If you're talking about the index, you cannot remove it, just prevent exporting it (e.g. as csv or xlsx, use index=False during export) — mozway
– mozway, Commented Oct 17, 2022 at 14:58
you can also use reset_index() to reset the index to be your row column if you desire. — topsail
– topsail, Commented Oct 17, 2022 at 14:59
All columns must have names. What column are you speaking of? — topsail
– topsail, Commented Oct 17, 2022 at 15:00

rafathasan · Accepted Answer · 2022-10-17 15:28:15Z

1

If I understand everything correctly then your dataframe looks like this:

   row   fruit  color
0    0   apple    red
1    1   berry   blue
2    2  grapes  green

Now if you want to write dataframe to a csv file without first column indexing then use dataframe.to_csv("file.csv", index=False) so that the file.csv file will look like this:

row,fruit,color
0,apple,red
1,berry,blue
2,grapes,green

And to remove header or first row use header=False to dataframe.to_csv("file.csv", index=False, header=False). Then your file.csv will look like:

0,apple,red
1,berry,blue
2,grapes,green

Hope this helps!!! And keep up the work toward learning Pandas.

answered Oct 17, 2022 at 15:28

rafathasan

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topsail · Accepted Answer · 2022-10-17 15:13:14Z

1

You can turn 'row' into your index, and remove the existing ("autonumbered" so to speak) index: df.set_index("row", inplace=True)

You can see all the options for set_index in the pandas docs:

https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.set_index.html

answered Oct 17, 2022 at 15:13

topsail

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