Print elements of a list to a .csv file

Question

I am reading in a csv file and dealing with each line as a list. At the end, I'd like to reprint to a .csv file, but the lines aren't necessarily even. I obviously cannot just go "print row", since this will print it as a list. How can I print it in .csv format?

Answer 1

Assuming that "row" contains a list of strings, you could try using

print ",".join(row)

Answer 2

Read manual, there's a CSV writer method (with example too). Don't print the data, store them and then write them into CSV file

http://docs.python.org/library/csv.html#csv.writer

Answer 3

What do you mean by "the lines aren't necessarily even"? Are you using a homebrew CSV parser or are you using the csv module?

If the former and there's nothing special you need to escape, you could try something like

print ",".join([ '"' + x.replace('"', '""') + '"' for x in row])

If you don't want ""s around each field, maybe make a function like escape_field() that checks if it needs to be wrapped in double quotes and/or escaped.