Hi all:
I'm editing sage.categories.quotient_fields and trying to import the algebraic_dependence() function. When i do so by inserting
from sage.rings.polynomial.multi_polynomial_sequence import algebraic_dependence
at the top of the file, saving, and rebuilding Sage, i get the following error when starting Sage. Is it some kind of circular importing problem?
AttributeError Traceback (most recent call last)
/Applications/sage/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
/Applications/sage/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
/Applications/sage/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)
/Applications/sage/local/lib/python2.6/site-packages/sage/all.py in <module>()
66 from time import sleep
67
---> 68 from sage.misc.all import * # takes a while
69
70 from sage.misc.sh import sh
/Applications/sage/local/lib/python2.6/site-packages/sage/misc/all.py in <module>()
79 from func_persist import func_persist
80
---> 81 from functional import (additive_order,
82 sqrt as numerical_sqrt,
83 arg,
/Applications/sage/local/lib/python2.6/site-packages/sage/misc/functional.py in <module>()
34
35
---> 36 from sage.rings.complex_double import CDF
37 from sage.rings.real_double import RDF, RealDoubleElement
38
/Applications/sage/local/bin/integer.pxd in init sage.rings.complex_double (sage/rings/complex_double.c:15016)()
7
8
----> 9
10
11
/Applications/sage/local/bin/integer.pyx in init sage.rings.integer (sage/rings/integer.c:35507)()
169
170
--> 171
172
173
/Applications/sage/local/lib/python2.6/site-packages/sage/rings/infinity.py in <module>()
198 #import sage.rings.real_mpfr
199 import sage.rings.integer
--> 200 import sage.rings.rational
201
202 from sage.rings.integer_ring import ZZ
/Applications/sage/local/bin/fast_arith.pxd in init sage.rings.rational (sage/rings/rational.c:25818)()
1
2
----> 3
4
5
/Applications/sage/local/bin/fast_arith.pyx in init sage.rings.fast_arith (sage/rings/fast_arith.c:7675)()
49
50
---> 51
52
53
/Applications/sage/local/bin/integer_ring.pyx in init sage.rings.integer_ring (sage/rings/integer_ring.c:11235)()
65
66
---> 67
68
69
/Applications/sage/local/lib/python2.6/site-packages/sage/rings/rational_field.py in <module>()
914
915
--> 916 QQ = RationalField()
917 Q = QQ
918
/Applications/sage/local/lib/python2.6/site-packages/sage/rings/rational_field.py in __init__(self)
210 ('x',)
211 """
--> 212 from sage.categories.basic import QuotientFields
213 ParentWithGens.__init__(self, self, category = QuotientFields())
214 self._assign_names(('x',),normalize=False) # ???
/Applications/sage/local/lib/python2.6/site-packages/sage/categories/basic.py in <module>()
46
47 from fields import Fields
---> 48 from quotient_fields import QuotientFields
49 from finite_fields import FiniteFields
50
/Applications/sage/local/lib/python2.6/site-packages/sage/categories/quotient_fields.py in <module>()
13 from sage.misc.abstract_method import abstract_method
14 from sage.misc.misc_c import prod
---> 15 from sage.rings.polynomial.multi_polynomial_sequence import algebraic_dependence
16
17 class QuotientFields(Category):
/Applications/sage/local/lib/python2.6/site-packages/sage/rings/polynomial/multi_polynomial_sequence.py in <module>()
154
155
--> 156 from sage.rings.polynomial.multi_polynomial_ring import is_MPolynomialRing
157 from sage.rings.quotient_ring import is_QuotientRing
158 from sage.rings.quotient_ring_element import QuotientRingElement
/Applications/sage/local/lib/python2.6/site-packages/sage/rings/polynomial/multi_polynomial_ring.py in <module>()
68
69 import sage.rings.integral_domain as integral_domain
---> 70 import sage.rings.fraction_field_element as fraction_field_element
71
72 from sage.rings.integer_ring import is_IntegerRing
/Applications/sage/local/bin/fraction_field_element.pyx in init sage.rings.fraction_field_element (sage/rings/fraction_field_element.c:9193)()
42
43
---> 44
45
46
AttributeError: 'module' object has no attribute 'ZZ'
Error importing ipy_profile_sage - perhaps you should run %upgrade?
WARNING: Loading of ipy_profile_sage failed.
