import timeit

test_hasattr = """

if hasattr(gizmo, 'gadget'):

feature = gizmo.gadget

else:

feature = None

"""

test_getattr = """

feature = getattr(gizmo, 'gadget', None)

"""

test_tryget = """

try:

feature = getattr(gizmo, 'gadget')

except AttributeError:

feature = None

"""

class Gizmo:

def __init__(self):

self.gadget = True

gizmo = Gizmo()

test_keys = 'hasattr', 'getattr', 'tryget'

def test():

for test_key in test_keys:

test_name = 'test_' + test_key

test = globals()[test_name]

setup = 'from __main__ import gizmo'

t_present = min(timeit.repeat(test, setup=setup))

del gizmo.gadget

t_absent = min(timeit.repeat(test, setup=setup))

gizmo.gadget = True

print('{:7} {:.3f} {:.3f}'.format(test_key, t_present, t_absent))

if __name__ == '__main__':

test()