Prefer __str__ over old prepare method.

Author: theengineear

plotly/exceptions.py

@@ -95,7 +95,6 @@ def __init__(self, message='', path=(), notes=None, plain_message=''):
         else:
             self.notes = [notes]
         super(PlotlyGraphObjectError, self).__init__(message)
-        self.prepare()
 
     def add_note(self, note):
         if isinstance(note, list):
@@ -109,7 +108,7 @@ def add_to_error_path(self, path):
         else:
             self.path = [path] + self.path
 
-    def prepare(self):
+    def __str__(self):
         message = self.message
         message += "\n\nPath To Error:\n["
         for iii, key in enumerate(self.path):
@@ -120,10 +119,7 @@ def prepare(self):
         if len(self.notes):
             message += "\n\nAdditional Notes:\n{0}".format(
                 "\n".join(self.notes))
-        if len(self.args) > 1:
-            self.args = (message, self.args[1:][0])
-        else:
-            self.args = message,
+        return message
 
 
 class PlotlyDictKeyError(PlotlyGraphObjectError):

plotly/graph_objs/graph_objs.py

@@ -213,7 +213,6 @@ def _value_to_graph_object(self, index, value, _raise=True):
             if _raise:
                 e = exceptions.PlotlyListEntryError(self, index, value)
                 e.path = self._get_path() + (index, )
-                e.prepare()
                 raise e
             else:
                 return
@@ -425,7 +424,6 @@ def __setitem__(self, key, value, _raise=True):
                 if _raise:
                     e = exceptions.PlotlyDictKeyError(self, key)
                     e.path = self._get_path() + (key, )
-                    e.prepare()
                     raise e
                 return
 
@@ -537,7 +535,6 @@ def _value_to_graph_object(self, key, value, _raise=True):
                 e = exceptions.PlotlyDictValueError(self, key, value,
                                                     val_types)
                 e.path = self._get_path() + (key, )
-                e.prepare()
                 raise e
             else:
                 return
@@ -940,7 +937,6 @@ def _value_to_graph_object(self, index, value, _raise=True):
             if _raise:
                 err = exceptions.PlotlyDataTypeError(self, index)
                 err.path = self._get_path() + (0, )
-                err.prepare()
                 raise err
 
         return GraphObjectFactory.create(item, _raise=_raise, _parent=self,

plotly/plotly/plotly.py

@@ -299,7 +299,6 @@ def iplot_mpl(fig, resize=True, strip_style=False, update=None,
         except exceptions.PlotlyGraphObjectError as err:
             err.add_note("Your updated figure could not be properly "
                          "validated.")
-            err.prepare()
             raise
     elif update is not None:
         raise exceptions.PlotlyGraphObjectError(
@@ -338,7 +337,6 @@ def plot_mpl(fig, resize=True, strip_style=False, update=None, **plot_options):
         except exceptions.PlotlyGraphObjectError as err:
             err.add_note("Your updated figure could not be properly "
                          "validated.")
-            err.prepare()
             raise
     elif update is not None:
         raise exceptions.PlotlyGraphObjectError(