Python Joining Two Csv Files

I have two .csv files, headers.csv and corrected.csv. Theheaders.csv has all the headers, and the corrected.csv is just a bunch of organized data. headers.csv: displacem

Solution 1:

Assuming that you have a single row with comma delimited column names, try: headers = next(csv.reader(open('headers.csv')))

Solution 2:

Using python to concatenate the files seems overkill -

cat headers.csv corrected.csv > merged.csv

If you have to/ for some reason want to use Python, Jon Clements has the right idea.

Solution 3:

In the first line you are creating a list (a comprehension list) with all the lines in headers.csv, that's why you have the [], etc.

Try with this (from the top of my mind):

headers = csv.reader(open('headers.csv', 'rb'))[0]

Which should return the first row only.

Solution 4:

I'd just hide the fact that you have multiple files from the csv module:

import csv

defcat(*files):
    for f in files:
        withopen(f) as fobj:
            for line in fobj:
                yield line

writer = csv.writer(open('merged.csv', 'wb'))
for row in csv.reader(cat('headers.csv', 'corrected.csv')):
    writer.writerow(row)