use isinstance to identify a Theano function instead of name.

theano/printing.py

@@ -4,6 +4,7 @@ They all allow different way to print a graph or the result of an Op in a graph(
 import sys, os, StringIO
 from copy import copy
 
+import theano
 import gof
 from theano import config
 from gof import Op, Apply
@@ -428,9 +429,8 @@ def pydotprint(fct, outfile=None,
     if outfile is None:
         outfile = os.path.join(config.compiledir,'theano.pydotprint.' +
                                config.device + '.' + format)
-    # I did this to avoid import scan_module.scan_utils, which would lead to
-    # a cycle import that I did not know how to solve
-    if fct.__class__.__name__ in ['Function','ScanInnerFunction']:
+
+    if isinstance(fct, (Function, theano.scan_module.scan_utils.ScanInnerFunction)):
         mode = fct.maker.mode
         fct_env  = fct.maker.env
         if not isinstance(mode,ProfileMode) or not mode.fct_call.has_key(fct):