example of catching exception with pytzeos

test_pytezos_exception.py

def test_increaseCounterBy_negative_value_should_throw_exception(self):
  try:
    # Given
    increase_value = -1
    # When
    self.contract.increaseCounterBy(increase_value).result(storage=0)
  except MichelsonRuntimeError as e:
    # Then
    return self.assertTrue("value should be > 0" in str(e))
  self.fail("This fail should not happen.")