What is verbosity level exactly in python?(difference between each level)
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What is the verbosity level in python.
I see it in unittest.

In documentation it just say simply that higher verbosity level, more info print out. but 
**more** means what? That is to say, which message will be printed out in a higher level and which will not?


Also find verbosity in logging.

I think they are different due to the reason that logging verbosity level is in [0, 50] and unittest's is just a unit number.
I just want to find out the difference between each verbosity level in unittests.
