Changeset b53e1fc for fedd

Timestamp:

May 25, 2010 10:50:01 AM (15 years ago)

Author:

Ted Faber <faber@…>

Branches:

axis_example, compt_changes, info-ops, master, version-3.01, version-3.02

Children:

da2208a

Parents:

75720ab

Message:

Added a routine for finding pickling problems

File:

• fedd/federation/util.py (modified) (2 diffs)

fedd/federation/util.py

@@ -4 +4 @@
 import string
 import logging
+import pickle
 
 import httplib
@@ -260 +261 @@
         else:
             return base
+
+def find_pickle_problem(o, st=None):
+    """
+    Debugging routine to figure out what doesn't pickle from a dict full of
+    dicts and lists.  It tries to walk down the lists and dicts and pickle each
+    atom.  If something fails to pickle, it prints an approximation of a stack
+    trace through the data structure.
+    """
+    if st is None: st = [ ]
+
+    if isinstance(o, dict):
+        for k, i in o.items():
+            st.append(k)
+            find_pickle_problem(i, st)
+            st.pop()
+    elif isinstance(o, list):
+        st.append('list')
+        for i in o:
+            find_pickle_problem(i, st)
+        st.pop()
+    else:
+        try:
+            pickle.dumps(o)
+        except pickle.PicklingError, e:
+            print >>sys.stderr, "<PicklingError>"
+            print >>sys.stderr, st
+            print >>sys.stderr, o
+            print >>sys.stderr, e
+            print >>sys.stderr, "</PicklingError>"
+