CODEWITHSUNDEEP
pythonsortingpython-2.7csv
Gabriel Butoeru
Gabriel Butoeru

Reputation: 131

Sort csv columns?

I have a CSV file that looks like:

Timestamp;A;O;P;M;
22:05;5;7;2;1
22:10;2;3,4;7
22:15;7;4;3;2

With a python script I would like to order the header (except the timestamp. it has to be the first column). What I mean is:

Timestamp;A;M;O;P;
22:05;5;1;7;2
22:10;2;7;3;4
22:15;7;2;4;3

How can I do it? I don't have any code because I can't figure out how to do it.

Upvotes: 0

Views: 1241

Answers (3)

akbsmile
akbsmile

Reputation: 1139

Hi this post might help you. Check this link. sort csv by column

https://stackoverflow.com/questions/2100353/sort-csv-by-column

Upvotes: 0

John Zwinck
John Zwinck

Reputation: 249642

You can do it with NumPy!

import numpy as np

a = np.loadtxt('a.txt', dtype=str, delimiter=';')
s = a[0].argsort() # produces the indexes which would sort the header
s = np.append(0, s[s!=0]) # put 0 at the front again, that's Timestamp
final = a[:,s]
np.savetxt('final.txt', final, fmt='%s', delimiter=';')

Upvotes: 2

Burhan Khalid
Burhan Khalid

Reputation: 174748

You mean something like this?

import csv

with open('old.csv', 'r') as i, open('new.csv', 'w') as o:
   reader = csv.reader(i, delimiter=';')
   writer = csv.writer(o, delimiter=';')
   for row in reader:
      writer.writerow([row[0], row[1], row[4], row[2], row[3]])

Upvotes: 1

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