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When doing power operation issue encountered TypeError: '<' not supp… #436

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When doing power operation issue encountered TypeError: '<' not supp… #436

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14 changes: 7 additions & 7 deletions numexpr/expressions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -271,17 +271,17 @@ def rtruediv_op(a, b):

@ophelper
def pow_op(a, b):
if (b.astKind in ('int', 'long') and
a.astKind in ('int', 'long') and
numpy.any(b.value < 0)):

raise ValueError(
'Integers to negative integer powers are not allowed.')

if allConstantNodes([a, b]):
return ConstantNode(a.value ** b.value)
if isinstance(b, ConstantNode):
x = b.value
# Numpy Error: Integers to negative integer powers are not allowed.
# if a is a vector of numpy integer, b is not allowed to be a negative integer(number or vector).
if (a.astKind in ('int', 'long') and
b.astKind in ('int', 'long') and
x < 0) :
raise ValueError(
'Integers to negative integer powers are not allowed.')
if get_optimization() == 'aggressive':
RANGE = 50 # Approximate break even point with pow(x,y)
# Optimize all integral and half integral powers in [-RANGE, RANGE]
Expand Down