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Error when trying to import without sage.all

asked 2017-12-12 04:06:39 +0100

jaebond gravatar image

updated 2017-12-12 17:57:16 +0100

I am trying to import only the Sage functions needed as is done in the Sage source code, but I am running into issues. For example, (running sage -python),

>>> from import Group

results in

from sage.rings.complex_double import CDF
File "sage/rings/real_double.pxd", line 8, in init sage.rings.complex_double (/export/pkgs/linux-rh6/sagemath-7.0/src/build/cythonized/sage/rings/complex_double.c:22654)
File "sage/rings/real_double.pyx", line 64, in init sage.rings.real_double (/export/pkgs/linux-rh6/sagemath-7.0/src/build/cythonized/sage/rings/real_double.c:25060)
ImportError: cannot import name ZZ

(I can post the full traceback if that would be helpful.) Similar things happen for almost any import I try. I was using the import_statements to determine what to import.

Am I missing something?


I think I get the picture a little better now. The Sage source files aren't meant to be imported in Python, they are meant to be imported into Sage, which presumably runs import sage.all when it starts.

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answered 2017-12-12 04:38:30 +0100

slelievre gravatar image

updated 2017-12-12 05:15:51 +0100

You first need to import sage.all.

The following should work (I'm including version info for reference):

$ sage -v
SageMath version 8.1, Release Date: 2017-12-07
$ sage -python
Python 2.7.14 (default, Dec  9 2017, 17:25:34) 
[GCC 7.2.0] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sage.all
>>> from import Group


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Asked: 2017-12-12 04:06:39 +0100

Seen: 592 times

Last updated: Dec 12 '17