def NumExpr(ex, signature=(), **kwargs):
"""
Compile an expression built using E.<variable> variables to a function.
ex can also be specified as a string "2*a+3*b".
The order of the input variables and their types can be specified using the
signature parameter, which is a list of (name, type) pairs.
Returns a `NumExpr` object containing the compiled function.
"""
# NumExpr can be called either directly by the end-user, in which case
# kwargs need to be sanitized by getContext, or by evaluate,
# in which case kwargs are in already sanitized.
# In that case frame_depth is wrong (it should be 2) but it doesn't matter
# since it will not be used (because truediv='auto' has already been
# translated to either True or False).
context = getContext(kwargs, frame_depth=1)
threeAddrProgram, inputsig, tempsig, constants, input_names = \
precompile(ex, signature, context)
program = compileThreeAddrForm(threeAddrProgram)
return interpreter.NumExpr(inputsig.encode('ascii'),
tempsig.encode('ascii'), program, constants,
input_names)
def NumExpr(ex, signature=(), copy_args=(), **kwargs):
"""
Compile an expression built using E.<variable> variables to a function.
ex can also be specified as a string "2*a+3*b".
The order of the input variables and their types can be specified using the
signature parameter, which is a list of (name, type) pairs.
Returns a `NumExpr` object containing the compiled function.
"""
threeAddrProgram, inputsig, tempsig, constants, input_names = \
precompile(ex, signature, copy_args, **kwargs)
program = compileThreeAddrForm(threeAddrProgram)
return interpreter.NumExpr(inputsig, tempsig, program, constants,
input_names)
