added a better docstring and improved the memoize function

interp/baker/__init__.py

@@ -196,10 +196,11 @@ def memoize(f):
   """
   cache = {}
   @wraps(f)
-  def memf(*x, **kargs):
+  def memf(simplex_size, nu):
+    x = (simplex_size, nu)
     if x not in cache:
       log.debug("adding to cache: %s", x)
-      cache[x] = f(*x, **kargs)
+      cache[x] = f(simplex_size, nu)
     return cache[x]
   return memf
 
@@ -207,7 +208,8 @@ def memoize(f):
 @memoize
 def pattern(simplex_size, nu):
   """
-    my useful docstring
+    This function returns the pattern requisite to compose the error
+    approximation function, and the matrix B.
   """
   log.debug("pattern: simplex: %d, order: %d" % (simplex_size, nu))
 
@@ -215,7 +217,8 @@ def pattern(simplex_size, nu):
   for i in itertools.product(xrange(simplex_size), repeat = nu):
     if len(set(i)) !=1:
       r.append(tuple(sorted(i)))
-  return list(set(r))
+  unique_r = list(set(r))
+  return unique_r
 
 
 if __name__ == '__main__':