Question

I just have few queries regarding the CSV files.

-All the values are equal to Header.

For Ex:-

abc.csv file contain

RollNO,Name,Age
1,Abc,15
2,Def,18

some times what’s happening the file is coming like this

RollNO,Name,Age
1,Abc,15
2,Def,18,blabla,21

In this case the value are greater then the header. So how can i check this thing.

-Check Blank Header

aaa.csv

RollNO,Name,Age, ,Address

I have to check that there should be no blank in the header.

-Check that there is no special character in the header.

bbb.csv

Rol$lNO,Name,Age,Address

I have to check this thing also that the header should not contain the special character.

Thanks in Advance!!!

Answer 1

import re    
csvfile = open('abc.csv','r')
csv = [line.split(',') for line in csvfile.readlines()]

Problem #1: Check if a data row is longer than the header row:

for i in csv[1:]:
    if len(i) > len(csv[0]):
        print("found a data row that is longer then the header row.")

Problem #2: Check if there’s an empty header item:

blank = re.compile(r'\s*')
for i in csv[0]:
    if blank.match(i).end() == len(i):
        print("found an empty header item")

Problem #3: Check if there’s any special characters in the header:

charset = re.compile(r'\w*')
for i in csv[0]:
    if charset.match(i).end() != len(i):
        print("found a header item that contains special characters.")