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MAINT: name filter predicate

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2015-10-19 16:35:02 -04:00
parent 78101fde75
commit 2df4dfd1bb
1 changed files with 2 additions and 4 deletions
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zipline/pipeline/loaders/blaze.py
+2 -4
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@@ -39,6 +39,7 @@ valid_deltas_node_types = (
bz.expr.ReLabel, bz.expr.ReLabel,
bz.expr.Symbol, bz.expr.Symbol,
) )
is_invalid_deltas_node = complement(flip(isinstance, valid_deltas_node_types))
getname = attrgetter('__name__') getname = attrgetter('__name__')
@@ -328,10 +329,7 @@ def from_blaze(expr,
""" """
deltas = _get_deltas(expr, deltas, no_deltas_rule) deltas = _get_deltas(expr, deltas, no_deltas_rule)
if deltas is not None: if deltas is not None:
invalid_nodes = tuple(filter( invalid_nodes = tuple(filter(is_invalid_deltas_node, expr._subterms()))
complement(flip(isinstance, valid_deltas_node_types)),
expr._subterms(),
))
if invalid_nodes: if invalid_nodes:
raise TypeError( raise TypeError(
'expression with deltas may only contain (%s) nodes,' 'expression with deltas may only contain (%s) nodes,'