Add timestamp to output to stop overwritting output

[gocyclones]

Can I make a suggestion to add a timestamp to the output so that it doesn' continue to overwrite itself on runs? I have done this with my own local copy by adding:
import time
and changing the CSV_writer sub to this:
csv_writer_subs = csv.writer(open(orgname + "_inventory_report." + time.strftime('%Y-%m-%d_%H:%M:%S') + ".csv", "wb"), delimiter=',', quotechar='"', quoting=csv.QUOTE_ALL)

Output for the file name looks like this now:
MyOrg_inventory_report.2017-04-03_19:34:05.csv

[sideangleside]

+1 Though I despise colons : in filenames. (But that's personal preference).

[gocyclones]

Not hung up on the format, just was something easy to make it unique.

[evgeni]

I think I'd add an --output switch, allowing the user to do whatever they want. And default it to something like %(org)s_inventory_report_%(time)s.csv.

Also -1 on colons. But that's fixable.