python如何判断对象的某个属性

class FooClass:

pass

k = FooClass()

try:

    #do some thing you need

    print k.att

except AttributeError as e:

    #error: has not attribute

    pass

>>> hasattr(list, 'append')

True

>>> hasattr(list, 'add')

False

objlist = dir(k)

if 'att' in objlist:

    #do some thing you need

    print k.att

else:

    #error: has not attribute

    pass