Less hacky versino

theano/configdefaults.py

@@ -295,7 +295,8 @@ AddConfigVar('traceback.limit',
              "The number of stack to trace. -1 mean all.",
 # We default to 6 to be able to know where v1 + v2 is created in the
 # user script. The bigger this number is, the more run time it takes.
-             IntParam(6),
+# We need to default to 7 to support theano.tensor.tensor(...).
+             IntParam(7),
              in_c_key=False)
 
 AddConfigVar('experimental.mrg',

theano/gof/type.py

@@ -307,7 +307,7 @@ class PureType(object):
     def make_constant(self, value, name=None):
         return self.Constant(type=self, data=value, name=name)
 
-    def __call__(self, name=None, limit=None):
+    def __call__(self, name=None):
         """Return a new `Variable` instance of Type `self`.
 
         :Parameters:
@@ -315,7 +315,7 @@ class PureType(object):
             A pretty string for printing and debugging.
 
         """
-        return utils.add_tag_trace(self.make_variable(name), limit=limit)
+        return utils.add_tag_trace(self.make_variable(name))
 
     def values_eq(self, a, b):
         """

theano/gof/utils.py

@@ -50,15 +50,17 @@ if sys.version_info[:2] > (3, 4):
     simple_extract_stack = traceback.extract_stack
 
 
-def add_tag_trace(thing, limit=None):
+def add_tag_trace(thing, user_line=1):
     """Add tag.trace to an node or variable.
 
     The argument is returned after being affected (inplace).
     :param thing: the object where we add .tag.trace
-    :param limit: The limit of the stack size.
-        If None use, config.traceback.limit
+    :param user_line: The max number of user line to keep.
+
+    :note: we alse use config.traceback.limit for the maximum number
+        of stack level we look.
+
     """
-    if limit is None:
     limit = config.traceback.limit
     if limit == -1:
         limit = None
@@ -72,14 +74,21 @@ def add_tag_trace(thing, limit=None):
         file_path = tr[-1][0]
         rm = False
         for p in ["theano/tensor/",
-                  "theano/gof/"]:
+                  "theano/gof/",
+                  "theano/scalar/basic.py",
+                  "theano/sandbox/",
+                  "theano/scan_module/",
+                  "theano/sparse/",
+                  "theano/typed_list/",
+        ]:
             if p in file_path:
                 tr = tr[:-1]
                 rm = True
                 break
         if not rm:
             break
-
+    if len(tr) > user_line:
+        tr = tr[:user_line]
     thing.tag.trace = tr
     return thing
 

theano/tensor/basic.py

@@ -744,12 +744,7 @@ def get_scalar_constant_value(orig_v, elemwise=True):
 
 def tensor(*args, **kwargs):
     name = kwargs.pop('name', None)
-    # This add an indirection to the normal call stack. So raise the
-    # limit to keep the good user line.
-    limit = config.traceback.limit
-    if limit != -1:
-        limit += 1
-    return TensorType(*args, **kwargs)(name=name, limit=limit)
+    return TensorType(*args, **kwargs)(name=name)
 
 
 def _multi(*fns):