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'test abstract classes'
__pychecker__ = 'no-classdoc'
class Abstract:
def f(self): raise NotImplementedError, "override in subclass"
def g(self): raise NotImplementedError
class ConcreteBad(Abstract):
def g(self): pass
class ConcreteGood(ConcreteBad):
def f(self): pass
a = Abstract() # error
cb = ConcreteBad() # error
cg = ConcreteGood() # ok, f defined
class ConcreteInst:
def f(self): raise SystemError("not yet ready for prime time")
ch = ConcreteInst() # ok, raises SystemError
class AbstractInst:
def f(self): raise NotImplementedError("not yet ready for prime time")
ch = AbstractInst()
cb.g()
def f():
class MoreBad(Abstract):
def g(): pass
_ = MoreBad() # FIXME, error not caught
import import73
class ImplAbstract(import73.AbstractLib):
def __init__(self):
import73.AbstractLib.__init__(self)
def lib_example():
_ = import73.AbstractLib() # error
unused = ImplAbstract() # error
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