How to catch KeyError Exception in Python?

A KeyError is raised when a value is not found as a key of a dictionary. The given code is rewritten as follows to catch the exception and find its type.

Example

import sys
try:
s = {'a':5, 'b':7}['c']

except:
print (sys.exc_info())

Output

(<type 'exceptions.KeyError'>, KeyError('c',), <traceback object at
 0x0000000003203748>)