[Cython] Fwd: [BUG] Cython failing performance when Numpy is not installed

[Alex S.]

Hello,
being unable to acquire the Trac account (Robert Bradshaw's email is not
listed on his site), I write here.
The issue was described here: http://trac.cython.org/ticket/847 but was,
however, misidentified. The wrapper for a function which receives "fused
slice" (D[:]) arguments automatically includes the following code:
> cdef type ndarray
> try:
> import numpy
> ndarray = numpy.ndarray
> except (ImportError, AttributeError, TypeError):
> ndarray = None
(Compiler/FusedNode.py:468).
When numpy is not installed, each import tries to search for it in the
system path. (When it is, it's just cached). This severely degrades the
performance.
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[Cython] Problem with declaring a map with an enum type.

[Brian McAndrews]

I have a C enum type that I'm attempting to put in a C++ map:
Here's what I got:

colors.h:
enum Color
  {
GREEN,BLUE,RED
  };

val.pyx:
from libcpp.string cimport string
from libcpp.map cimport map

cdef extern from "colors.h":
cpdef enum _Color "Color":
   GREEN,BLUE,RED

cdef class TestMe:
cdef public map[string, _Color] vals


I get a compile error (VSC++ 2012)
VAL.cpp(1239) : error C2440: '=' : cannot convert from 'long' to 'Color'
Conversion to enumeration type requires an explicit cast (static_cast, 
C-style cast or function-style cast)

The offending statement is this:
__pyx_t_9 = PyInt_AsLong(__pyx_v_value); if (unlikely(PyErr_Occurred())) 
{__pyx_filename = __pyx_f[1]; __pyx_lineno = 202; __pyx_clineno = __LINE__; 
goto __pyx_L1_error;}

In the __pyx_convert_map_from_py_std_3a__3a_string__and_enum__Color function.

The cast from PyInt_AsLong(...) to an enum Color is not specified when using 
maps.

If I don't put it in a map (just as a member variable), the cast is performed.

Has anyone seen this before?

Thanks,
Brian






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