[processing] fixed error when running script algorithm from script ed…

…itor (fixes #9905)

python/plugins/processing/gui/ScriptEditorDialog.py

@@ -36,18 +36,13 @@
 from qgis.core import *
 
 from processing import interface
-
 from processing.gui.ParametersDialog import ParametersDialog
 from processing.gui.HelpEditionDialog import HelpEditionDialog
-from processing.gui.ScriptEdit import ScriptEdit
-
 from processing.modeler.Providers import Providers
-
 from processing.r.RAlgorithm import RAlgorithm
 from processing.r.RUtils import RUtils
 from processing.script.ScriptAlgorithm import ScriptAlgorithm
 from processing.script.ScriptUtils import ScriptUtils
-
 from processing.ui.ui_DlgScriptEditor import Ui_DlgScriptEditor
 
 import processing.resources_rc

python/plugins/processing/script/ScriptAlgorithm.py

@@ -26,7 +26,6 @@
 __revision__ = '$Format:%H$'
 
 import os
-import sys
 from PyQt4 import QtGui
 from processing.core.GeoAlgorithm import GeoAlgorithm
 from processing.gui.Help2Html import Help2Html
@@ -218,7 +217,7 @@ def processParameterLine(self, line):
             self.addOutput(out)
         else:
             raise WrongScriptException('Could not load script:'
-                                       + self.descriptionFile
+                                       + self.descriptionFile or ''
                                        + '.\n Problem with line "' + line + '"'
                                        )
 
@@ -234,7 +233,7 @@ def processDescriptionParameterLine(self, line):
                 self.addOutput(OutputFactory.getFromString(line))
         except Exception:
             raise WrongScriptException('Could not load script:'
-                                       + self.descriptionFile
+                                       + self.descriptionFile or ''
                                        + '.\n Problem with line "' + line + '"'
                                        )
 
@@ -257,6 +256,8 @@ def processAlgorithm(self, progress):
             out.setValue(ns[out.name])
 
     def helpFile(self):
+        if self.descriptionFile is None:
+            return None
         helpfile = self.descriptionFile + '.help'
         if os.path.exists(helpfile):
             h2h = Help2Html()