{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Installation\n", "\n", "```pip install cython```\n", "\n", "# Using inside Jupyter notebook\n", "\n", "Load th cythonmagic extension." ] }, { "cell_type": "code", "execution_count": 1, "metadata": { "collapsed": false }, "outputs": [], "source": [ "%load_ext cython" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Then, simply use the magic function to start writing cython code." ] }, { "cell_type": "code", "execution_count": 2, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "45\n" ] } ], "source": [ "%%cython\n", "\n", "cdef int a = 0\n", "for i in range(10):\n", " a += i\n", "print(a)" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Add `--annotate` or `-a` for showing a code analysis of the compiled code" ] }, { "cell_type": "code", "execution_count": 3, "metadata": { "collapsed": false }, "outputs": [ { "name": "stdout", "output_type": "stream", "text": [ "45\n" ] }, { "data": { "text/html": [ "\n", "\n", "\n", "\n", " \n", " Cython: _cython_magic_6ba45f17d130910db2606828f4326b2d.pyx\n", " \n", " \n", "\n", "\n", "

Generated by Cython 0.25.2

\n", "

\n", " Yellow lines hint at Python interaction.
\n", " Click on a line that starts with a \"+\" to see the C code that Cython generated for it.\n", "

\n", "
 1:
\n", "
+2: cdef int a = 0
\n", "
  __pyx_v_46_cython_magic_6ba45f17d130910db2606828f4326b2d_a = 0;\n",
       "
+3: for i in range(10):
\n", "
  __pyx_t_1 = __Pyx_PyObject_Call(__pyx_builtin_range, __pyx_tuple_, NULL); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "  __Pyx_GOTREF(__pyx_t_1);\n",
       "  if (likely(PyList_CheckExact(__pyx_t_1)) || PyTuple_CheckExact(__pyx_t_1)) {\n",
       "    __pyx_t_2 = __pyx_t_1; __Pyx_INCREF(__pyx_t_2); __pyx_t_3 = 0;\n",
       "    __pyx_t_4 = NULL;\n",
       "  } else {\n",
       "    __pyx_t_3 = -1; __pyx_t_2 = PyObject_GetIter(__pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "    __Pyx_GOTREF(__pyx_t_2);\n",
       "    __pyx_t_4 = Py_TYPE(__pyx_t_2)->tp_iternext; if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "  }\n",
       "  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;\n",
       "  for (;;) {\n",
       "    if (likely(!__pyx_t_4)) {\n",
       "      if (likely(PyList_CheckExact(__pyx_t_2))) {\n",
       "        if (__pyx_t_3 >= PyList_GET_SIZE(__pyx_t_2)) break;\n",
       "        #if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS\n",
       "        __pyx_t_1 = PyList_GET_ITEM(__pyx_t_2, __pyx_t_3); __Pyx_INCREF(__pyx_t_1); __pyx_t_3++; if (unlikely(0 < 0)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "        #else\n",
       "        __pyx_t_1 = PySequence_ITEM(__pyx_t_2, __pyx_t_3); __pyx_t_3++; if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "        __Pyx_GOTREF(__pyx_t_1);\n",
       "        #endif\n",
       "      } else {\n",
       "        if (__pyx_t_3 >= PyTuple_GET_SIZE(__pyx_t_2)) break;\n",
       "        #if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS\n",
       "        __pyx_t_1 = PyTuple_GET_ITEM(__pyx_t_2, __pyx_t_3); __Pyx_INCREF(__pyx_t_1); __pyx_t_3++; if (unlikely(0 < 0)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "        #else\n",
       "        __pyx_t_1 = PySequence_ITEM(__pyx_t_2, __pyx_t_3); __pyx_t_3++; if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "        __Pyx_GOTREF(__pyx_t_1);\n",
       "        #endif\n",
       "      }\n",
       "    } else {\n",
       "      __pyx_t_1 = __pyx_t_4(__pyx_t_2);\n",
       "      if (unlikely(!__pyx_t_1)) {\n",
       "        PyObject* exc_type = PyErr_Occurred();\n",
       "        if (exc_type) {\n",
       "          if (likely(exc_type == PyExc_StopIteration || PyErr_GivenExceptionMatches(exc_type, PyExc_StopIteration))) PyErr_Clear();\n",
       "          else __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "        }\n",
       "        break;\n",
       "      }\n",
       "      __Pyx_GOTREF(__pyx_t_1);\n",
       "    }\n",
       "    if (PyDict_SetItem(__pyx_d, __pyx_n_s_i, __pyx_t_1) < 0) __PYX_ERR(0, 3, __pyx_L1_error)\n",
       "    __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;\n",
       "/* … */\n",
       "  }\n",
       "  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;\n",
       "
+4:     a += i
\n", "
    __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_46_cython_magic_6ba45f17d130910db2606828f4326b2d_a); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 4, __pyx_L1_error)\n",
       "    __Pyx_GOTREF(__pyx_t_1);\n",
       "    __pyx_t_5 = __Pyx_GetModuleGlobalName(__pyx_n_s_i); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 4, __pyx_L1_error)\n",
       "    __Pyx_GOTREF(__pyx_t_5);\n",
       "    __pyx_t_6 = PyNumber_InPlaceAdd(__pyx_t_1, __pyx_t_5); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 4, __pyx_L1_error)\n",
       "    __Pyx_GOTREF(__pyx_t_6);\n",
       "    __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;\n",
       "    __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;\n",
       "    __pyx_t_7 = __Pyx_PyInt_As_int(__pyx_t_6); if (unlikely((__pyx_t_7 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 4, __pyx_L1_error)\n",
       "    __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;\n",
       "    __pyx_v_46_cython_magic_6ba45f17d130910db2606828f4326b2d_a = __pyx_t_7;\n",
       "
+5: print(a)
\n", "
  __pyx_t_2 = __Pyx_PyInt_From_int(__pyx_v_46_cython_magic_6ba45f17d130910db2606828f4326b2d_a); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 5, __pyx_L1_error)\n",
       "  __Pyx_GOTREF(__pyx_t_2);\n",
       "  __pyx_t_6 = PyTuple_New(1); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 5, __pyx_L1_error)\n",
       "  __Pyx_GOTREF(__pyx_t_6);\n",
       "  __Pyx_GIVEREF(__pyx_t_2);\n",
       "  PyTuple_SET_ITEM(__pyx_t_6, 0, __pyx_t_2);\n",
       "  __pyx_t_2 = 0;\n",
       "  __pyx_t_2 = __Pyx_PyObject_Call(__pyx_builtin_print, __pyx_t_6, NULL); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 5, __pyx_L1_error)\n",
       "  __Pyx_GOTREF(__pyx_t_2);\n",
       "  __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;\n",
       "  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;\n",
       "
" ], "text/plain": [ "" ] }, "execution_count": 3, "metadata": {}, "output_type": "execute_result" } ], "source": [ "%%cython --annotate\n", "\n", "cdef int a = 0\n", "for i in range(10):\n", " a += i\n", "print(a)" ] } ], "metadata": { "anaconda-cloud": {}, "kernelspec": { "display_name": "Python [conda env:py3]", "language": "python", "name": "conda-env-py3-py" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 3 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", "version": "3.5.2" } }, "nbformat": 4, "nbformat_minor": 1 }