python - Sed -i is creating new lines and printing output -

we have script compares 2 csv files rows , printing “match found” or “not found” output @ end of 2nd file each row. working good, have updated cygwin, not sure went wrong, prints output next line rows. has changed new version of cygwin- python, , shell

below code line using:

sed -i "${linenum}s/$/,found/" file2.csv  file1.csv abcd efgh ijkl mnop qrst xyz  file2.csv abcd efgh ijkl      found mnop qrst xyzzz     not found 

it should print above. displaying below.

file2.csv abcd efgh  ijkl      found mnop qrst     xyzzz          not found 

your appreciated.

this looks issue newlines. windows platforms use \r\n newline sequence, whereas unix platforms use \n alone. if file contains \r\n , code inserting content after \r , before \n, that's implicated.

an easy fix convert files unix format first, , (optionally) when you're done:

dos2unix file2.csv sed -i "${linenum}s/$/,found/" file2.csv unix2dos file2.csv ## if want dos-style newlines