debugprint now stop printing the "|" symbol in a columns after the last input.

NEWS.txt

@@ -24,6 +24,7 @@ New Feature
    as this is more readable.
  * debugprint new param stop_on_name=[False,True]. If True, we don't print
    anything bellow an intermediate variable that have a name. Default to False.
+ * debugprint now stop printing the "|" symbol in a columns after the last input.
 
 =============
 Release Notes

theano/compile/debugmode.py

@@ -502,7 +502,8 @@ def char_from_number(number):
 
 def debugprint(r, prefix='', depth=-1, done=None, print_type=False,
                file=sys.stdout, print_destroy_map=False, print_view_map=False,
-               order=[], ids='CHAR', stop_on_name=False):
+               order=[], ids='CHAR', stop_on_name=False,
+               prefix_child=None):
     """Print the graph leading to `r` to given depth.
 
     :param r: Variable instance
@@ -535,6 +536,9 @@ def debugprint(r, prefix='', depth=-1, done=None, print_type=False,
     else:
         type_str = ''
 
+    if prefix_child is None:
+        prefix_child = prefix
+
     def get_id_str(obj):
         if obj in done:
             id_str = "[@%s]" % done[obj]
@@ -598,10 +602,16 @@ def debugprint(r, prefix='', depth=-1, done=None, print_type=False,
         if not already_printed:
             if (not stop_on_name or
                 not (hasattr(r, 'name') and r.name is not None)):
-                for i in a.inputs:
-                    debugprint(i, prefix + ' |', depth=depth - 1, done=done,
+                new_prefix = prefix_child + ' |'
+                new_prefix_child = prefix_child + ' |'
+                for idx, i in enumerate(a.inputs):
+                    if idx == len(a.inputs) - 1:
+                        new_prefix_child = prefix_child + '  '
+
+                    debugprint(i, new_prefix, depth=depth - 1, done=done,
                                print_type=print_type, file=file, order=order,
-                               ids=ids, stop_on_name=stop_on_name)
+                               ids=ids, stop_on_name=stop_on_name,
+                               prefix_child=new_prefix_child)
     else:
         #this is an input variable
         id_str = get_id_str(r)

theano/tests/test_printing.py

@@ -112,8 +112,8 @@ def test_debugprint():
  | |A [@2]
  | |B [@3]
  |Elemwise{add,no_inplace} [@4] ''   
- | |D [@5]
- | |E [@6]
+   |D [@5]
+   |E [@6]
 """
 
     if s != reference:
@@ -132,8 +132,8 @@ def test_debugprint():
  | |A [@C]
  | |B [@D]
  |Elemwise{add,no_inplace} [@E] ''   
- | |D [@F]
- | |E [@G]
+   |D [@F]
+   |E [@G]
 """
 
     if s != reference:
@@ -151,8 +151,8 @@ def test_debugprint():
     reference = """Elemwise{add,no_inplace} [@A] ''   
  |Elemwise{add,no_inplace} [@B] 'C'   
  |Elemwise{add,no_inplace} [@C] ''   
- | |D [@D]
- | |E [@E]
+   |D [@D]
+   |E [@E]
 """
 
     if s != reference:
@@ -172,8 +172,8 @@ def test_debugprint():
  | |A 
  | |B 
  |Elemwise{add,no_inplace}  ''   
- | |D 
- | |E 
+   |D 
+   |E 
 """
     if s != reference:
         print '--'+s+'--'