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run Python file from command line in Sage

asked 2013-05-31 09:25:44 +0200

updated 2013-05-31 09:31:56 +0200

I'm trying to run some Python file with Sage. I can import the module just fine within the interactive Sage IPython shell.

However, this very simple test fails:


where contains the single line:

from sage.matrix.matrix2 import Matrix

It fails with:

Traceback (most recent call last):
  File "", line 1, in <module>
    from sage.matrix.matrix2 import Matrix
  File "matrix2.pyx", line 1, in init sage.matrix.matrix2 (sage/matrix/matrix2.c:71259)
  File "matrix1.pyx", line 1, in init sage.matrix.matrix1 (sage/matrix/matrix1.c:13931)
  File "matrix0.pyx", line 32, in init sage.matrix.matrix0 (sage/matrix/matrix0.c:29567)
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/modules/", line 163, in <module>
    import free_module_element
  File "integer.pxd", line 9, in init sage.modules.free_module_element (sage/modules/free_module_element.c:30936)
  File "integer.pyx", line 178, in init sage.rings.integer (sage/rings/integer.c:38404)
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/rings/", line 203, in <module>
    import sage.rings.rational
  File "fast_arith.pxd", line 5, in init sage.rings.rational (sage/rings/rational.c:27749)
  File "fast_arith.pyx", line 51, in init sage.rings.fast_arith (sage/rings/fast_arith.c:8051)
  File "integer_ring.pyx", line 67, in init sage.rings.integer_ring (sage/rings/integer_ring.c:12156)
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/structure/", line 188, in <module>
    from sage.misc.all import prod
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/misc/", line 85, in <module>
    from functional import (additive_order,
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/misc/", line 36, in <module>
    from sage.rings.complex_double import CDF
  File "complex_double.pyx", line 87, in init sage.rings.complex_double (sage/rings/complex_double.c:16745)
  File "real_mpfr.pxd", line 15, in init sage.rings.complex_number (sage/rings/complex_number.c:18304)
  File "real_mpfr.pyx", line 1, in init sage.rings.real_mpfr (sage/rings/real_mpfr.c:33344)
  File "utils.pyx", line 11, in init sage.libs.mpmath.utils (sage/libs/mpmath/utils.c:6633)
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/", line 86, in <module>
    from sage.libs.all       import *
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/libs/", line 1, in <module>
    import sage.libs.ntl.all  as ntl
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/libs/ntl/", line 1, in <module>
    import all
  File "/Applications/sage-5.9/local/lib/python2.7/site-packages/sage/libs/ntl/", line 26, in <module>
    from sage.libs.ntl.ntl_ZZ import (
  File "ntl_ZZ.pyx", line 24, in init sage.libs.ntl.ntl_ZZ (sage/libs/ntl/ntl_ZZ.cpp:7011)
ImportError: cannot import name IntegerRing

I just stumbled upon local/bin/sage-eval which imports this at the beginning:

import sys
from sage.all import *
from sage.calculus.predefined import x
from sage.misc.preparser import preparse

When I do ...

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answered 2013-05-31 11:56:50 +0200

Jesustc gravatar image

It is enough to add to

from sage.all import *
from sage.matrix.matrix2 import Matrix

Alternatively, the 2nd line (yours) is enough if you rename your file to sageruntest.sage (then it will be preparsed by Sage).

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Instead of from sage.all import * you can just do import sage.all:

from sage.all import *
from sage.matrix.matrix2 import Matrix
slelievre gravatar imageslelievre ( 2017-12-12 05:02:21 +0200 )edit

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Asked: 2013-05-31 09:25:44 +0200

Seen: 3,165 times

Last updated: May 31 '13