Added function to iterate through nested code objects, llpython.opcode_util.itercodeobjs(), and used it in llpython.addr_flow.

llpython/opcode_util.py

@@ -1,9 +1,10 @@
 #! /usr/bin/env python
 # ______________________________________________________________________
 
+from collections import namedtuple
 import dis
 import opcode
-from collections import namedtuple
+import types
 
 # ______________________________________________________________________
 # Module data
@@ -195,6 +196,16 @@ def itercode(code, start = 0):
 
 # ______________________________________________________________________
 
+def itercodeobjs(codeobj):
+    "Iterator that traverses code objects via the co_consts member."
+    yield codeobj
+    for const in codeobj.co_consts:
+        if isinstance(const, types.CodeType):
+            for childobj in itercodeobjs(const):
+                yield childobj
+
+# ______________________________________________________________________
+
 def extendlabels(code, labels = None):
     """Extend the set of jump target labels to account for the
     passthrough targets of conditional branches.