Here's a working example:
import wikipedia
try:
wikipedia.page('equipment')
except wikipedia.exceptions.DisambiguationError as e:
print("Error: {0}".format(e))
Regarding to your more general question how can I find the error type for a library-specific class like this?, my trick is actually quite simple, I tend to capture Exception and then just printing the __class__, that way I'll know what specific Exception I need to capture.
One example of figuring out which specific exception to capture here:
try:
0/0
except Exception as e:
print("Exception.__class__: {0}".format(e.__class__))
This would print Exception.__class__: <type 'exceptions.ZeroDivisionError'>, so I knew exceptions.ZeroDivisionError would be the exact Exception to deal with instead of something more generic