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binding=True in .pxd generates global too late #1658

jdemeyer opened this Issue Apr 3, 2017 · 0 comments


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jdemeyer commented Apr 3, 2017

Consider test.pxd:

cimport cython

cpdef inline bint fun():
    return 1

and test.pyx:

x = repr(fun)   # Or anything else accessing "fun"

This compiles but fails at runtime with a NameError saying that fun is not defined. The reason is that Cython generates code for x = repr(fun) before the code which assigns fun in the module global dict:

  /* "test.pyx":1
 * x = repr(fun)             # <<<<<<<<<<<<<<
  __pyx_t_1 = __Pyx_GetModuleGlobalName(__pyx_n_s_fun); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 1, __pyx_L1_error)
  __pyx_t_2 = PyObject_Repr(__pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 1, __pyx_L1_error)
  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
  if (PyDict_SetItem(__pyx_d, __pyx_n_s_x, __pyx_t_2) < 0) __PYX_ERR(1, 1, __pyx_L1_error)
  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
  __pyx_t_2 = PyDict_New(); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 1, __pyx_L1_error)
  if (PyDict_SetItem(__pyx_d, __pyx_n_s_test, __pyx_t_2) < 0) __PYX_ERR(1, 1, __pyx_L1_error)
  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;

  /* "test.pxd":4
 * @cython.binding(True)
 * cpdef inline bint fun():             # <<<<<<<<<<<<<<
 *     return 1
  __pyx_t_2 = __Pyx_CyFunction_NewEx(&__pyx_mdef_4test_1fun, 0, __pyx_n_s_fun, NULL, __pyx_n_s_test_2, __pyx_d, ((PyObject *)__pyx_codeobj_)); if (unlikely(!__pyx_t_2))
  if (PyDict_SetItem(__pyx_d, __pyx_n_s_fun, __pyx_t_2) < 0) __PYX_ERR(0, 4, __pyx_L1_error)
  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;

The problem does not occur when everything is in one .pyx file.

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