lim added final touches to skyline and polygon, and added skyline tests

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/branches/sphere@17428 fe389314-cf27-0410-b35b-8c050e845b92

Former-commit-id: 7d98dcd06a908e74b9c69699ee813e23d468dad3

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/skyline.py b/lib/skyline.py
index bcc3bae..2cc70c1 100644
--- a/lib/skyline.py
+++ b/lib/skyline.py
@@ -161,6 +161,8 @@ class SkyLine(object):
             HST images. PRIMARY if image is single ext.
 
         """
+        extname = extname.upper()
+        
         # Convert SCI data to SkyLineMember
         if fname is not None:
             with pyfits.open(fname) as pf:
@@ -177,7 +179,14 @@ class SkyLine(object):
             self.polygon = SphericalPolygon([])
 
     def __getattr__(self, what):
-        return getattr(self.polygon, what)
+        """Control attribute access to `SphericalPolygon`."""
+        if what in ('from_radec', 'from_cone', 'from_wcs',
+                    'multi_union', 'multi_intersection',
+                    '_find_new_inside',):
+            raise AttributeError('\'SkyLine\' object has no attribute \'%s\'' %
+                                 what)
+        else:
+            return getattr(self.polygon, what)
 
     def __copy__(self):
         return deepcopy(self)