improved error messagse

theano/gof/cc.py

@@ -1106,6 +1106,8 @@ def _execute(cthunk, init_tasks, tasks, error_storage):
                 print >> sys.stderr, 'ERROR retrieving error_storage', error_storage
                 raise
 
+
+
             raise exc_type, exc_value, exc_trace
     execute.cthunk = cthunk
     return execute

theano/gof/env.py

@@ -232,7 +232,7 @@ class Env(utils.object2):
                     if hasattr(r, 'env') and r.env is not self:
                         raise Exception("%s is already owned by another env" % r)
                     if r.owner is None and not isinstance(r, graph.Value) and r not in self.inputs:
-                        raise TypeError("An input of the graph was not provided and not given a value", r)
+                        raise TypeError("An input of the graph, used to compute "+str(node)+", was not provided and not given a value", r)
 
         for node in new_nodes:
             assert node not in self.nodes

theano/misc/strutil.py

@@ -11,5 +11,5 @@ def renderString(string, dict):
                 if str(F) == str(E):
                     raise Exception(string[0:i]+"<<<< caused exception "+str(F))
             i+=1
-        assert False	
+        assert False
     return finalCode

theano/tensor/blas.py

@@ -275,8 +275,8 @@ class GemmRelated(Op):
         if (Nx[1] != Ny[0])
         {
             PyErr_Format(PyExc_ValueError,
-                "Shape mismatch: x has %%ld cols but y has %%ld rows",
-                (long int)Nx[1], (long int)Ny[0]);
+                "Shape mismatch: x has %%ld cols (and %%ld rows) but y has %%ld rows (and %%ld cols)",
+                (long int)Nx[1], (long int)Nx[0], (long int)Ny[0], (long int)Ny[1]);
             %(fail)s;
         }
         if (Ny[1] != Nz[1])