Merge pull request #74 from eteq/low-level-wcs-checking

add check that input to HighLevelWCS is a low level WCS
astropy · Oct 2, 2018 · 54187ae · 54187ae
2 parents c4b99de + f086e2d
commit 54187ae
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/astropy/wcs/wcsapi/high_level_wcs_wrapper.py b/astropy/wcs/wcsapi/high_level_wcs_wrapper.py
@@ -1,5 +1,7 @@
 from .high_level_api import HighLevelWCSMixin
 
+from . import BaseLowLevelWCS
+
 __all__ = ['HighLevelWCSWrapper']
 
 
@@ -10,6 +12,9 @@ class HighLevelWCSWrapper(HighLevelWCSMixin):
     """
 
     def __init__(self, low_level_wcs):
+        if not isinstance(low_level_wcs, BaseLowLevelWCS):
+            raise TypeError('Input to a HighLevelWCSWrapper must be a low level WCS object')
+
         self._low_level_wcs = low_level_wcs
 
     @property