Hi there,
Currently with sage-4.8, there is an import loop (see below). I just pushed
the following **TEMPORARY PATCH** which should fix it. By the way there are a
*lot* of stuff that are imported by default in combinat and that we should
lazy_import. Please fix correctly.
Florent
================
popcorn-*at/sage/combinat $ hg qpus
application de TEMPORARY_IMPORT_LOOP_FIX.patch
actuellement à : TEMPORARY_IMPORT_LOOP_FIX.patch
popcorn-*at/sage/combinat $ hg qdiff
diff --git a/sage/combinat/subword_complex.py b/sage/combinat/subword_complex.py
--- a/sage/combinat/subword_complex.py
+++ b/sage/combinat/subword_complex.py
@@ -21,7 +21,8 @@ from sage.misc.cachefunc import cached_m
from sage.modules.free_module_element import vector
from sage.homology.simplicial_complex import SimplicialComplex, Simplex
from sage.combinat.combination import Combinations
-from sage.geometry.polyhedron.constructor import Polyhedron
+from sage.misc.lazy_import import lazy_import
+lazy_import('sage.geometry.polyhedron.constructor', ['Polyhedron'])
from sage.geometry.cone import Cone
from sage.structure.element import Element
from sage.structure.parent import Parent
================
----------------------------------------------------------------------
| Sage Version 4.8, Release Date: 2012-01-20 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/IPython/ipmaker.pyc
in force_import(modname, force_reload)
61 reload(sys.modules[modname])
62 else:
---> 63 __import__(modname)
64
65
/home/data/Sage-Install/sage-4.8/local/bin/ipy_profile_sage.py in <module>()
5 preparser(True)
6
----> 7 import sage.all_cmdline
8 sage.all_cmdline._init_cmdline(globals())
9
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/all_cmdline.py
in <module>()
12 try:
13
---> 14 from sage.all import *
15 from sage.calculus.predefined import x
16 preparser(on=True)
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/all.py
in <module>()
108
109 from sage.coding.all import *
--> 110 from sage.combinat.all import *
111
112 from sage.lfunctions.all import *
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/combinat/all.py
in <module>()
112
113 # Cluster Algebras and Quivers
--> 114 from cluster_algebra_quiver.all import *
115
116 #import lrcalc
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/combinat/cluster_algebra_quiver/all.py
in <module>()
2 from quiver import Quiver, PathAlgebra, QuiverMorphism, GAPQuiver
3 from cluster_seed import ClusterSeed
----> 4 from cluster_complex import ClusterComplex
5
6
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/combinat/cluster_algebra_quiver/cluster_complex.py
in <module>()
19 from sage.combinat.root_system.coxeter_group import CoxeterGroup
20 from sage.combinat.cluster_algebra_quiver.cluster_seed import
ClusterSeed
---> 21 from sage.combinat.subword_complex import SubwordComplex,
SubwordComplexFacet
22 from sage.rings.semirings.non_negative_integer_semiring import NN
23
/home/data/Sage-Install/sage-4.8/local/lib/python2.6/site-packages/sage/combinat/subword_complex.py
in <module>()
22 from sage.homology.simplicial_complex import SimplicialComplex, Simplex
23 from sage.combinat.combination import Combinations
---> 24 from sage.geometry.polyhedron.constructor import Polyhedron
25 from sage.geometry.cone import Cone
26 from sage.structure.element import Element
ImportError: No module named polyhedron.constructor
Error importing ipy_profile_sage - perhaps you should run %upgrade?
WARNING: Loading of ipy_profile_sage failed.
sage:
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