PY
py
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class Mother:
def __init__(self, name, daughter=None):
self.name = name
self.daughter = daughter and self.Daughter(daughter, self)
class Daughter:
def __init__(self, name, mom):
self.name = name
self.mother = mom
mom = Mother("Jessie", "Ruby")
print(mom.daughter.name)
daut = Mother.Daughter("Charlotte", mom)
print(daut.mother.name)
daut2 = Daughter("Louise", mom)
# Error occurs because
# there's no <class "Daughter">
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OUTPUT
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