Confusing exception error message

[BothoP]

basil/basil/dut.py

Lines 255 to 267 in 07b7cf3

	try:
	mod = import_module(importname)
	except ImportError: # give it another try
	exc = sys.exc_info() # temporarily save exception
	if mod_name:
	try:
	mod = import_module(mod_name)
	except ImportError:
	raise exc[0], exc[1], exc[2] # raise previous error
	else:
	importname = mod_name
	else: # finally raise exception
	raise

Why is in line 263 the previous error raised? This lead to a confusing error message for me when I was missing pyUSB, but the error shown was "module pytlu.ZestSC1TL does not exist" or something like that when I called the pytlu program. pytluZestSC1TL was not the problem, but that module crashed when trying to load pyUSB.