使用Python的拆分功能将csv分为多列

Question

I am trying to split a specific column of csv into multiple column and then appending the split values at the end of each row.

I wanted to split second column on ',' and '.' and ';' and then append to each row respective values.

 import csv fOpen1=open('Meta_D1.txt') reader=csv.reader(fOpen1) mylist=[elem[1].split(',') for elem in reader] mylist1=[] for elem in mylist: mylist1.append(elem) #writing to a csv file with open('out1.csv', 'wb') as fp: myf = csv.writer(fp, delimiter=',') myf.writerows(mylist1) 

Can someone guide me further?

Answer 1

To split with multiple delimiters, you can use regex :

import re
re.split(';|, |\. ', col_2)

Example from your file:

>>> col_2 = "Braund, Mr. Owen Harris;22"
>>> re.split(';|, |\. ', col_2)
['Braund', 'Mr', 'Owen Harris', '22']

Using this, try the following to achieve your desired output:

import csv
import re

with open('out1.csv', 'wb') as fp:
    with open('Meta_D1.txt', 'r') as f:
        reader = csv.reader(f)
        next(reader)
        for line in reader:
            cols = re.split(';|, |\. ', line[1])
            del line[1]
            line.extend(cols)
            myf = csv.writer(fp, delimiter=',')
            myf.writerow(line)