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enh!: Respect input order of collection in summary #1364

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enh!: Respect input order of collection in summary #1364

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12 changes: 9 additions & 3 deletions datashader/reductions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2128,9 +2128,15 @@ class summary(Expr):
performed in two stages.
"""
def __init__(self, **kwargs):
ks, vs = zip(*sorted(kwargs.items()))
self.keys = ks
self.values = vs
self._collection = kwargs

@property
def keys(self):
return list(self._collection)

@property
def values(self):
return list(self._collection.values())

def __hash__(self):
return hash((type(self), tuple(self.keys), tuple(self.values)))
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