Tab Delimited to Comma Separated file in UNIX - One liner?

I have a tab delimited file (MySQL Out file).

I want to convert it into CSV file. I got everything working except for replacing NULLs to nothing or spaces.

What I have is : sed -e 's/^/"/; s/$/"/; s/\t/","/g;' < file.csv > file1.csv

How to also replace NULLs in the s开发者_如何学JAVAame line.

The following doesn't work.

sed -e 's/NULL//; s/^/"/; s/$/"/; s/\t/","/g;' < file.csv > file1.csv

Any input is much appreciated.

Thank you!

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you can't do this with sed.

#!/usr/bin/env python

import sys, csv

reader = csv.reader(open(sys.argv[1], 'rb'), delimiter="\t", escapechar="\\")
writer = csv.writer(open('output.csv', 'wb'))
for row in reader:
    writer.writerow(row)

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Didn't you just forget to put the 'g'-modifier in there?

sed -e 's/NULL//g; s/^/"/; s/$/"/; s/\t/","/g;' < file.csv > file1.csv