def setUp(self):
comp = Composition("LiFeO2")
entry = PDEntry(comp, 53)
self.transformed_entry = TransformedPDEntry(
{
DummySpecie('Xa'): 1,
DummySpecie("Xb"): 1
}, entry)
def transform_entries(self, entries, terminal_compositions):
"""
Method to transform all entries to the composition coordinate in the
terminal compositions. If the entry does not fall within the space
defined by the terminal compositions, they are excluded. For example,
Li3PO4 is mapped into a Li2O:1.5, P2O5:0.5 composition. The terminal
compositions are represented by DummySpecies.
Args:
entries:
Sequence of all input entries
terminal_compositions:
Terminal compositions of phase space.
Returns:
Sequence of TransformedPDEntries falling within the phase space.
"""
new_entries = []
if self.normalize_terminals:
fractional_comp = [
c.get_fractional_composition() for c in terminal_compositions
]
else:
fractional_comp = terminal_compositions
#Map terminal compositions to unique dummy species.
sp_mapping = collections.OrderedDict()
for i, comp in enumerate(fractional_comp):
sp_mapping[comp] = DummySpecie("X" + chr(102 + i))
for entry in entries:
try:
rxn = Reaction(fractional_comp, [entry.composition])
rxn.normalize_to(entry.composition)
#We only allow reactions that have positive amounts of
#reactants.
if all([
rxn.get_coeff(comp) <= CompoundPhaseDiagram.amount_tol
for comp in fractional_comp
]):
newcomp = {
sp_mapping[comp]: -rxn.get_coeff(comp)
for comp in fractional_comp
}
newcomp = {
k: v
for k, v in newcomp.items()
if v > CompoundPhaseDiagram.amount_tol
}
transformed_entry = \
TransformedPDEntry(Composition(newcomp), entry)
new_entries.append(transformed_entry)
except ReactionError:
#If the reaction can't be balanced, the entry does not fall
#into the phase space. We ignore them.
pass
return new_entries, sp_mapping
