> How do I set an environment variable in the Sage code?
>
>From the command line, you can just do:
sage: import os
Then os.environ is a dictionary storing your environment variables. In
particular:
sage: os.environ['SAGE_BANNER'] = 'no'
sage: search_src("def", "MatrixSpace")
coding/sd_codes.py:def MS(n): n2 = ZZ(n)/2; return MatrixSpace(F, n2, n)
coding/sd_codes.py:def MS2(n): n2 = n.quo_rem(2)[0]; return
MatrixSpace(F, n2, n2)
matrix/matrix_space.py:def is_MatrixSpace(x):
matrix/matrix_space.py:def MatrixSpace(base_ring, nrows, ncols=None,
sparse=False):
groups/matrix_gps/matrix_group.py: self.__matrix_space =
MatrixSpace(self.field_of_definition(), self.__n)
modular/abvar/homology.py: Full MatrixSpace of 4 by 4 dense
matrices over Number Field in I with defining polynomial x^2 + 1
server/notebook/interact.py: sage:
sage.server.notebook.interact.InputGrid('M', 2,2, default_value =
[[1,2],[3,4]], label='M', to_value=MatrixSpace(ZZ,2,2))
server/notebook/interact.py: sage: input_grid(2,2, default
= [[1,2],[3,4]], label='M', to_value=MatrixSpace(ZZ,2,2))
-cc
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