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authorTim Peters <tim.peters@gmail.com>2001-09-22 06:10:55 (GMT)
committerTim Peters <tim.peters@gmail.com>2001-09-22 06:10:55 (GMT)
commite0b2d7ac9aea548d0bee1cdabd5d7b1254a6569d (patch)
tree277d3df4bdf475df490eb652e387707951c945ab /Lib/inspect.py
parentc377b16d12ba325bb108eca575447d66f19294c0 (diff)
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Add a function to compute a class's method resolution order. This is
easy for 2.2 new-style classes, but trickier for classic classes, and different approaches are needed "depending". The function will allow later code to treat all flavors of classes uniformly.
Diffstat (limited to 'Lib/inspect.py')
-rw-r--r--Lib/inspect.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/Lib/inspect.py b/Lib/inspect.py
index 1102c3b..3febf18 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -163,6 +163,24 @@ def getmembers(object, predicate=None):
results.sort()
return results
+# ----------------------------------------------------------- class helpers
+def _searchbases(cls, accum):
+ # Simulate the "classic class" search order.
+ if cls in accum:
+ return
+ accum.append(cls)
+ for base in cls.__bases__:
+ _searchbases(base, accum)
+
+def getmro(cls):
+ "Return tuple of base classes (including cls) in method resolution order."
+ if hasattr(cls, "__mro__"):
+ return cls.__mro__
+ else:
+ result = []
+ _searchbases(cls, result)
+ return tuple(result)
+
# -------------------------------------------------- source code extraction
def indentsize(line):
"""Return the indent size, in spaces, at the start of a line of text."""