[lib] Try to display clearer error and better error handling after a fail...

[lib] Try to display clearer error and better error handling after a fail while reading an xml file model

library/cadbiom/models/guard_transitions/translators/chart_xml.py

@@ -52,13 +52,17 @@ Classes::
 from __future__ import unicode_literals
 from __future__ import print_function
 
-from cadbiom.models.guard_transitions.chart_model import ChartModel
 from xml.sax import make_parser
 from xml.sax import parseString
 from xml.sax.handler import ContentHandler
 from lxml import etree
 from lxml import objectify
 
+from cadbiom.models.guard_transitions.chart_model import ChartModel
+import cadbiom.commons as cm
+
+LOGGER = cm.logger()
+
 
 class XmlVisitor:
     """Visitor used to generate xml cadbiom code when the model is exported."""
@@ -482,13 +486,13 @@ class MakeModelFromXmlFile:
 
         try:
             self.parser.parse(xml_file)
+
+            # The model is currently not modified in comparison to the file
+            self.handler.model.modified = False
         except Exception:
-            print("ERROR while xml parsing")
+            LOGGER.error("Error while reading the XML file <%s>", xml_file)
             raise
 
-        # The model is currently not modified in comparison to the file
-        self.handler.model.modified = False
-
     @property
     def model(self):
         """Return the model generated from the XML file
@@ -509,12 +513,12 @@ class MakeModelFromXmlString:
 
         try:
             parseString(xml_string, self.handler)
-        except Exception as exc:
-            print("ERROR while xml parsing")
-            print(exc)
 
-        # The model is currently not modified in comparison to the file
-        self.handler.model.modified = False
+            # The model is currently not modified in comparison to the file
+            self.handler.model.modified = False
+        except Exception:
+            LOGGER.error("Error while reading the XML string")
+            raise
 
     @property
     def model(self):