Print output in csv format

[mmacata]

This PR suggests to add a new print format in CSV table style. Module and imports are listed, separated by ;

Example:

$ findimports --table

apple;os
apple;os.path
apple;sys
apple;sys
box.cat;gc
box.cat;box.yarn
box.cat;decoy
findimports;argparse
findimports;ast
findimports;doctest
...

[mgedmin]

Thank you for your contribution!

I don't mind adding a CSV output format, but why use ; as separator? CSV stands for Comma-Separated Values, after all.

Also, --table to me implies an ASCII-art formatted table for human consumption, so please use --csv or something.

(And this needs unit tests.)

[mmacata]

Thank you for your contribution!

I don't mind adding a CSV output format, but why use ; as separator? CSV stands for Comma-Separated Values, after all.

Also, --table to me implies an ASCII-art formatted table for human consumption, so please use --csv or something.

(And this needs unit tests.)

Thank you for your quick response!

I also had --csv in mind, but the -c was already taken 😬 That's why I came up with --table.

In the new suggestion I use --tabular and keep the -t. What do you think? I also thought about --table-csv.

And I replaced the ; with ,. I know the abbreviation 🙃 but as most applications or libraries have options to specify the delimiter, I ususally prefer ;. But in this context here, a , is very unlikely to appear in a field, so it is fine for me.

Also tests are now added.

[mgedmin]

Wait, -c is already used? I missed that when I looked at the options. -C could still be used.

I was thinking maybe --output=csv or --output-format=csv? -o csv for short, if -o is not taken yet. (This could later be generalized to add -o json and other formats.)

[mmacata]

Allright, I would go with -C then.

[mmacata]

@mgedmin do you agree now?

[mgedmin]

Thank you, merged.