Copy only the headers of a csv file into a new file using python

Question

I am looking to copy only the first row(headers) of a csv file as row in a new file.

I currently have this piece of code which transposes the entire file and writes it into a new file.

But my requirement is only to have the headers of a csv file into another skipping the first row entirely.

import pandas as pd
pd.read_csv('Cars.csv', header=None).T.to_csv('output.csv', header=False, index=False)

.iloc[0] or .columns() without the header=None would also work — willwrighteng
– willwrighteng, Commented Oct 9, 2020 at 17:39

Cameron Riddell · Accepted Answer · 2020-10-09 19:07:57Z

1

You can get the headers (first row) much more efficiently without pandas:

with open("Cars.csv", 'r') as fid:
    header_list = fid.readline().strip().split(",")

with open("out.csv", 'w') as fid:
    fid.write("\n")
    fid.write("\n".join(header_list))

edited Oct 9, 2020 at 19:07

answered Oct 9, 2020 at 17:38

Cameron Riddell

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7 Comments

Aanurag Das Over a year ago

Apologies I wanted them the headers in a column in a new file. I wrote rows by mistake. Apologies for the confusion

Cameron Riddell Over a year ago

changed it so now the code is reading the first line out of "cars.csv" and writing that line into "out.csv"

Aanurag Das Over a year ago

I am getting an error fid.write(header_line) io. UnsupportedOperation : not writeable error

Aanurag Das Over a year ago

Just one last thing currently I am reading my data in row. Can it be re- arranged into columns please

Cameron Riddell Over a year ago

You got that error because I forgot the "w" when opening the second file. Thanks for the edit! What do you mean by "No Company Car Model"?

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