Appending At New Line In Python Using Csv Library

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Problem Description:

I am unable to handle case where user forgot to put newline.

I am trying to append new line to a csv file in python using below code –

with open(local_file_location, 'a') as file:
    writer = csv.writer(file)
    writer.writerow(row)

But in case if file do not have a new line it simply appends to same last line for the first time. And I am not sure how to handle that.

Ex-
Input-

1,2,3,4 <no-newline>

add row – {a,b,c,d}
Output-

1,2,3,4,a,b,c,d

but I want handle output in this event case to be as below –

1,2,3,4
a,b,c,d

Note: it should just append as well in case user file already have a new line.-> which current program does perfectly.

Let me know what can I do.

Solution – 1

You can check if a file ends with a newline.

with open(local_file_location, 'r') as file:
    data = file.read()

if data.endswith('n'):
    # some logic

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