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Update graph operator overloading for subclasses #1349

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merged 4 commits into from
Jul 2, 2021
Merged

Update graph operator overloading for subclasses #1349

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d6aa01d
Update graph operator overloading for subclasses
shreyasnagare Jun 30, 2021
529caa2
Add tests for operators
shreyasnagare Jun 30, 2021
db531bf
Add fallback for subclasses with required init args
shreyasnagare Jun 30, 2021
d605a70
Use type(self)() instead of self.__class__().
shreyasnagare Jul 1, 2021
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6 changes: 3 additions & 3 deletions rdflib/graph.py
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Original file line number Diff line number Diff line change
Expand Up @@ -558,7 +558,7 @@ def __isub__(self, other):
def __add__(self, other):
"""Set-theoretic union
BNode IDs are not changed."""
retval = Graph()
retval = self.__class__()
for (prefix, uri) in set(list(self.namespaces()) + list(other.namespaces())):
retval.bind(prefix, uri)
for x in self:
Expand All @@ -570,7 +570,7 @@ def __add__(self, other):
def __mul__(self, other):
"""Set-theoretic intersection.
BNode IDs are not changed."""
retval = Graph()
retval = self.__class__()
for x in other:
if x in self:
retval.add(x)
Expand All @@ -579,7 +579,7 @@ def __mul__(self, other):
def __sub__(self, other):
"""Set-theoretic difference.
BNode IDs are not changed."""
retval = Graph()
retval = self.__class__()
for x in self:
if x not in other:
retval.add(x)
Expand Down