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Prevent inadvertent attribute assignment in Quantity #1124

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Oct 19, 2021
Merged

Prevent inadvertent attribute assignment in Quantity #1124

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2 changes: 2 additions & 0 deletions interfaces/cython/cantera/composite.py
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Original file line number Diff line number Diff line change
Expand Up @@ -195,6 +195,8 @@ class Quantity:
>>> q3.P
101325.0
"""
__slots__ = ("state", "_phase", "_id", "mass", "constant")

def __init__(self, phase, mass=None, moles=None, constant='UV'):
self.state = phase.TDY
self._phase = phase
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5 changes: 5 additions & 0 deletions interfaces/cython/cantera/test/test_thermo.py
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Expand Up @@ -1445,6 +1445,11 @@ def test_equilibrate(self):
q1.equilibrate('HP')
self.assertNear(q1.T, T2)

def test_invalid_setter(self):
q1 = ct.Quantity(self.gas, mass =3)
with self.assertRaises(AttributeError):
q1.HPQ = self.gas.H, self.gas.P, 1

def test_incompatible(self):
gas2 = ct.Solution('h2o2.yaml', transport_model=None)
q1 = ct.Quantity(self.gas)
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