Refactoring python to wxArrayString, and better exception error reporting

pcbnew/scripting/pcbnew_footprint_wizards.cpp

@@ -63,25 +63,9 @@ PyObject* PYTHON_FOOTPRINT_WIZARD::CallMethod( const char* aMethod, PyObject* aA
 
         if( PyErr_Occurred() )
         {
-            wxString    message;
+            wxMessageBox( PyErrStringWithTraceback(),
-            PyObject*   t;
-            PyObject*   v;
-            PyObject*   b;
-
-            PyErr_Fetch( &t, &v, &b );
-            message.Printf( wxT( "calling %s()\n"
-                                 "Exception: %s\n"
-                                 "         : %s\n" ),
-                            FROM_UTF8( aMethod ).c_str(),
-                            FROM_UTF8( PyString_AsString( PyObject_Str( v ) ) ).c_str(),
-                            FROM_UTF8( PyString_AsString( PyObject_Str( b ) ) ).c_str()
-                            );
-
-            wxMessageBox( message,
                           wxT( "Exception on python footprint wizard code" ),
                           wxICON_ERROR | wxOK );
-
-            PyErr_Clear();
         }
 
         if( result )
@@ -140,17 +124,7 @@ wxArrayString PYTHON_FOOTPRINT_WIZARD::CallRetArrayStrMethod( const char*   aMet
             return ret;
         }
 
-        int list_size = PyList_Size( result );
+        ret = PyArrayStringToWx( result );
-
-        for( int n = 0; n<list_size; n++ )
-        {
-            PyObject*   element = PyList_GetItem( result, n );
-
-            const char* str_res = PyString_AsString( element );
-
-            str_item = FROM_UTF8( str_res );
-            ret.Add( str_item, 1 );
-        }
 
         Py_DECREF( result );
     }

scripting/python_scripting.cpp

@@ -38,6 +38,7 @@
 #include <wxstruct.h>
 #include <common.h>
 #include <colors.h>
+#include <macros.h>
 
 /* init functions defined by swig */
 
@@ -62,11 +63,11 @@ static int          SwigNumModules = 0;
 
 static void swigAddModule( const char* name, void (* initfunc)() )
 {
-    SwigImportInittab[SwigNumModules].name = (char*) name;
+    SwigImportInittab[SwigNumModules].name      = (char*) name;
-    SwigImportInittab[SwigNumModules].initfunc = initfunc;
+    SwigImportInittab[SwigNumModules].initfunc  = initfunc;
     SwigNumModules++;
-    SwigImportInittab[SwigNumModules].name = (char*) 0;
+    SwigImportInittab[SwigNumModules].name      = (char*) 0;
-    SwigImportInittab[SwigNumModules].initfunc = 0;
+    SwigImportInittab[SwigNumModules].initfunc  = 0;
 }
 
 
@@ -165,7 +166,7 @@ bool pcbnewInitPythonScripting()
     {
         PyLOCK lock;
 
-        PyRun_SimpleString( "import sys\n"
+        PyRun_SimpleString( "import sys, traceback\n"
                             "sys.path.append(\".\")\n"
                             "import pcbnew\n"
                             "pcbnew.LoadPlugins()"
@@ -198,7 +199,7 @@ void RedirectStdio()
         "output = wx.PyOnDemandOutputWindow()\n"
         "sys.stderr = output\n";
 
-    PyLOCK      lock;
+    PyLOCK lock;
 
     PyRun_SimpleString( python_redirect );
 }
@@ -295,3 +296,57 @@ wxWindow* CreatePythonShellWindow( wxWindow* parent )
 
 
 #endif
+
+wxArrayString PyArrayStringToWx( PyObject* aArrayString )
+{
+    wxArrayString   ret;
+
+    int             list_size = PyList_Size( aArrayString );
+
+    for( int n = 0; n<list_size; n++ )
+    {
+        PyObject* element = PyList_GetItem( aArrayString, n );
+
+        ret.Add( FROM_UTF8( PyString_AsString( element ) ), 1 );
+    }
+
+    return ret;
+}
+
+
+wxString PyErrStringWithTraceback()
+{
+    wxString err;
+
+    if( !PyErr_Occurred() )
+        return err;
+
+    PyObject*   type;
+    PyObject*   value;
+    PyObject*   traceback;
+
+    PyErr_Fetch( &type, &value, &traceback );
+
+    PyObject*   tracebackModuleString = PyString_FromString( (char*) "traceback" );
+    PyObject*   tracebackModule = PyImport_Import( tracebackModuleString );
+
+
+    PyObject*   formatException = PyObject_GetAttrString( tracebackModule,
+                                                          (char*) "format_exception" );
+    PyObject*   args = Py_BuildValue( "(O,O,O)", type, value, traceback );
+
+    PyObject*   result = PyObject_CallObject( formatException, args );
+
+    Py_DECREF( args );
+
+    wxArrayString res = PyArrayStringToWx( result );
+
+    for( int i = 0; i<res.Count(); i++ )
+    {
+        err += res[i] + wxT( "\n" );
+    }
+
+    PyErr_Clear();
+
+    return err;
+}

scripting/python_scripting.h

@@ -53,4 +53,7 @@ public:
 
 #endif
 
+wxArrayString   PyArrayStringToWx( PyObject* arr );
+wxString        PyErrStringWithTraceback();
+
 #endif    // __PYTHON_SCRIPTING_H