spyder: enable for all python interpreters

Rope is not ported to python3 yet, so it is disabled (it's a
"recommended" dependency, not critical).

Changed files
+4
pkgs
+4
pkgs/top-level/python-packages.nix
···
});
+
spyder = callPackage ../applications/science/spyder {
+
rope = if isPy3k then null else self.rope;
+
};
+
sqlalchemy = self.sqlalchemy9.override rec {
name = "SQLAlchemy-0.7.10";
disabled = isPy34;