mjo/basis_repr.py: replace deprecated is_MatrixSpace()

diff --git a/mjo/basis_repr.py b/mjo/basis_repr.py
index 9b9f15db9d42b22aec6983006771c33ef32801ff..b0b6083951b4589e3d5b53d6fcad9bef6ac3a425 100644 (file)
--- a/mjo/basis_repr.py
+++ b/mjo/basis_repr.py
@@ -11,7 +11,7 @@ a vector space of the same dimension.
 """
 
 from sage.all import *
-from sage.matrix.matrix_space import is_MatrixSpace
+from sage.matrix.matrix_space import MatrixSpace
 
 def _mat2vec(m):
     return vector(m.base_ring(), m.list())
@@ -100,7 +100,7 @@ def basis_repr(M):
         True
 
     """
-    if is_MatrixSpace(M):
+    if isinstance(M, MatrixSpace):
         basis_space = M
         basis = list(M.basis())
     else:
@@ -209,7 +209,7 @@ def basis_repr_of_operator(M, L):
         True
 
     """
-    if is_MatrixSpace(M):
+    if isinstance(M, MatrixSpace):
         basis_space = M
         basis = list(M.basis())
     else: