Level 0 [DEFAULT]: --verbosity=0 OR -d0

Displays nothing but warnings/errors generated while processing the data.

Level 1: --verbosity=1 OR -d1

Same as level 0 except it also includes information about the input files being used for processing and some basic sequence information.

Level 2: --verbosity=2 OR -d2

Same as level 1 except it includes more detailed sequence information and an 80 character wide progress bar that is displayed while calculating the list of propagating exceptions.

Level 3: --verbosity=3 OR -d3

Same as level 2 except that instead of a progress bar, it displays the names of each function being processesed as it is being done.