How can I read only the header column of a CSV file using Python?

Question

I am looking for a a way to read just the header row of a large number of large CSV files.

Using Pandas, I have this method available, for each csv file:

Answer 1

I've used iglob as an example to search for the .csv files, but one way is to use a set, then adjust as necessary, eg:

import csv
from glob import iglob

unique_headers = set()
for filename in iglob('*.csv'):
    with open(filename, 'rb') as fin:
        csvin = csv.reader(fin)
        unique_headers.update(next(csvin, []))