class Component:
"""
Simple class with a measure
"""
# declare a measure
attr = measure()
class Shadow(Derived):
"""
A component that redeclares ancestor traits
"""
bm = measure()
bm.default = "a value"
bm.tip = 'a shadowing value'
class Base(Component):
"""
A simple component
"""
bm = measure()
bm.default = 1
bm.tip = 'a simple value'
class Derived(Base):
"""
A derived component
"""
# a simple measure
dm = measure()
dm.default = True
dm.tip = 'another simple value'
class NotOK(Component):
"""
Incompatible
"""
missing = measure()
class OK(Component):
"""
Unrelated but compatible
"""
# because it defines the correct trait
common = measure()
class Derived(Base):
"""
A derived component
"""
# with an extra trait
extra = measure()
class Base(Component):
"""
A component
"""
# with a trait
common = measure()