Merged revisions 60245-60277 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r60246 | guido.van.rossum | 2008-01-24 18:58:05 +0100 (Thu, 24 Jan 2008) | 2 lines
Fix test67.py from issue #1303614.
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r60248 | raymond.hettinger | 2008-01-24 19:05:54 +0100 (Thu, 24 Jan 2008) | 1 line
Clean-up and speed-up code by accessing numerator/denominator directly. There's no reason to enforce readonliness
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r60249 | raymond.hettinger | 2008-01-24 19:12:23 +0100 (Thu, 24 Jan 2008) | 1 line
Revert 60189 and restore performance.
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r60250 | guido.van.rossum | 2008-01-24 19:21:02 +0100 (Thu, 24 Jan 2008) | 5 lines
News about recently fixed crashers:
- A few crashers fixed: weakref_in_del.py (issue #1377858);
loosing_dict_ref.py (issue #1303614, test67.py);
borrowed_ref_[34].py (not in tracker).
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r60252 | thomas.heller | 2008-01-24 19:36:27 +0100 (Thu, 24 Jan 2008) | 7 lines
Use a PyDictObject again for the array type cache; retrieving items
from the WeakValueDictionary was slower by nearly a factor of 3.
To avoid leaks, weakref proxies for the array types are put into the
cache dict, with weakref callbacks that removes the entries when the
type goes away.
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r60253 | thomas.heller | 2008-01-24 19:54:12 +0100 (Thu, 24 Jan 2008) | 2 lines
Replace Py_BuildValue with PyTuple_Pack because it is faster.
Also add a missing DECREF.
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r60254 | raymond.hettinger | 2008-01-24 20:05:29 +0100 (Thu, 24 Jan 2008) | 1 line
Add support for trunc().
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r60255 | thomas.heller | 2008-01-24 20:15:02 +0100 (Thu, 24 Jan 2008) | 5 lines
Invert the checks in get_[u]long and get_[u]longlong. The intent was
to not accept float types; the result was that integer-like objects
were not accepted.
Ported from release25-maint.
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r60256 | raymond.hettinger | 2008-01-24 20:30:19 +0100 (Thu, 24 Jan 2008) | 1 line
Add support for int(r) just like the other numeric classes.
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r60263 | raymond.hettinger | 2008-01-24 22:23:58 +0100 (Thu, 24 Jan 2008) | 1 line
Expand tests to include nested graph structures.
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r60264 | raymond.hettinger | 2008-01-24 22:47:56 +0100 (Thu, 24 Jan 2008) | 1 line
Shorter pprint's for empty sets and frozensets. Fix indentation of frozensets. Add tests including two complex data structures.
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r60265 | amaury.forgeotdarc | 2008-01-24 23:51:18 +0100 (Thu, 24 Jan 2008) | 14 lines
#1920: when considering a block starting by "while 0", the compiler optimized the
whole construct away, even when an 'else' clause is present::
while 0:
print("no")
else:
print("yes")
did not generate any code at all.
Now the compiler emits the 'else' block, like it already does for 'if' statements.
Will backport.
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r60266 | amaury.forgeotdarc | 2008-01-24 23:59:25 +0100 (Thu, 24 Jan 2008) | 2 lines
News entry for r60265 (Issue 1920).
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r60269 | raymond.hettinger | 2008-01-25 00:50:26 +0100 (Fri, 25 Jan 2008) | 1 line
More code cleanup. Remove unnecessary indirection to useless class methods.
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r60270 | raymond.hettinger | 2008-01-25 01:21:54 +0100 (Fri, 25 Jan 2008) | 1 line
Add support for copy, deepcopy, and pickle.
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r60271 | raymond.hettinger | 2008-01-25 01:33:45 +0100 (Fri, 25 Jan 2008) | 1 line
Mark todos and review comments.
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r60272 | raymond.hettinger | 2008-01-25 02:13:12 +0100 (Fri, 25 Jan 2008) | 1 line
Add one other review comment.
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r60273 | raymond.hettinger | 2008-01-25 02:23:38 +0100 (Fri, 25 Jan 2008) | 1 line
Fix-up signature for approximation.
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r60274 | raymond.hettinger | 2008-01-25 02:46:33 +0100 (Fri, 25 Jan 2008) | 1 line
More design notes
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r60276 | neal.norwitz | 2008-01-25 07:37:23 +0100 (Fri, 25 Jan 2008) | 6 lines
Make the test more robust by trying to reconnect up to 3 times
in case there were transient failures. This will hopefully silence
the buildbots for this test. As we find other tests that have a problem,
we can fix with a similar strategy assuming it is successful. It worked
on my box in a loop for 10+ runs where it would have an exception otherwise.
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r60277 | neal.norwitz | 2008-01-25 09:04:16 +0100 (Fri, 25 Jan 2008) | 4 lines
Add prototypes to get the mathmodule.c to compile on OSF1 5.1 (Tru64)
and eliminate a compiler warning in floatobject.c. There might be
a better way to go about this, but it should be good enough for now.
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diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index e761f19..9e3d64f 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -8,6 +8,7 @@
from random import randrange, shuffle
import sys
import warnings
+import collections
class PassThru(Exception):
pass
@@ -1605,6 +1606,110 @@
self.assertRaises(TypeError, getattr(set('january'), methname), N(data))
self.assertRaises(ZeroDivisionError, getattr(set('january'), methname), E(data))
+# Application tests (based on David Eppstein's graph recipes ====================================
+
+def powerset(U):
+ """Generates all subsets of a set or sequence U."""
+ U = iter(U)
+ try:
+ x = frozenset([next(U)])
+ for S in powerset(U):
+ yield S
+ yield S | x
+ except StopIteration:
+ yield frozenset()
+
+def cube(n):
+ """Graph of n-dimensional hypercube."""
+ singletons = [frozenset([x]) for x in range(n)]
+ return dict([(x, frozenset([x^s for s in singletons]))
+ for x in powerset(range(n))])
+
+def linegraph(G):
+ """Graph, the vertices of which are edges of G,
+ with two vertices being adjacent iff the corresponding
+ edges share a vertex."""
+ L = {}
+ for x in G:
+ for y in G[x]:
+ nx = [frozenset([x,z]) for z in G[x] if z != y]
+ ny = [frozenset([y,z]) for z in G[y] if z != x]
+ L[frozenset([x,y])] = frozenset(nx+ny)
+ return L
+
+def faces(G):
+ 'Return a set of faces in G. Where a face is a set of vertices on that face'
+ # currently limited to triangles,squares, and pentagons
+ f = set()
+ for v1, edges in G.items():
+ for v2 in edges:
+ for v3 in G[v2]:
+ if v1 == v3:
+ continue
+ if v1 in G[v3]:
+ f.add(frozenset([v1, v2, v3]))
+ else:
+ for v4 in G[v3]:
+ if v4 == v2:
+ continue
+ if v1 in G[v4]:
+ f.add(frozenset([v1, v2, v3, v4]))
+ else:
+ for v5 in G[v4]:
+ if v5 == v3 or v5 == v2:
+ continue
+ if v1 in G[v5]:
+ f.add(frozenset([v1, v2, v3, v4, v5]))
+ return f
+
+
+class TestGraphs(unittest.TestCase):
+
+ def test_cube(self):
+
+ g = cube(3) # vert --> {v1, v2, v3}
+ vertices1 = set(g)
+ self.assertEqual(len(vertices1), 8) # eight vertices
+ for edge in g.values():
+ self.assertEqual(len(edge), 3) # each vertex connects to three edges
+ vertices2 = set(v for edges in g.values() for v in edges)
+ self.assertEqual(vertices1, vertices2) # edge vertices in original set
+
+ cubefaces = faces(g)
+ self.assertEqual(len(cubefaces), 6) # six faces
+ for face in cubefaces:
+ self.assertEqual(len(face), 4) # each face is a square
+
+ def test_cuboctahedron(self):
+
+ # http://en.wikipedia.org/wiki/Cuboctahedron
+ # 8 triangular faces and 6 square faces
+ # 12 indentical vertices each connecting a triangle and square
+
+ g = cube(3)
+ cuboctahedron = linegraph(g) # V( --> {V1, V2, V3, V4}
+ self.assertEqual(len(cuboctahedron), 12)# twelve vertices
+
+ vertices = set(cuboctahedron)
+ for edges in cuboctahedron.values():
+ self.assertEqual(len(edges), 4) # each vertex connects to four other vertices
+ othervertices = set(edge for edges in cuboctahedron.values() for edge in edges)
+ self.assertEqual(vertices, othervertices) # edge vertices in original set
+
+ cubofaces = faces(cuboctahedron)
+ facesizes = collections.defaultdict(int)
+ for face in cubofaces:
+ facesizes[len(face)] += 1
+ self.assertEqual(facesizes[3], 8) # eight triangular faces
+ self.assertEqual(facesizes[4], 6) # six square faces
+
+ for vertex in cuboctahedron:
+ edge = vertex # Cuboctahedron vertices are edges in Cube
+ self.assertEqual(len(edge), 2) # Two cube vertices define an edge
+ for cubevert in edge:
+ self.assert_(cubevert in g)
+
+
#==============================================================================
def test_main(verbose=None):
@@ -1644,6 +1749,7 @@
TestCopyingNested,
TestIdentities,
TestVariousIteratorArgs,
+ TestGraphs,
)
test_support.run_unittest(*test_classes)