Fix deprecated import path [#892] (#893)

* fix deprecated import path

* Drop "docs" builds based on changed in the tox file

* Update rtd build to fix it

* Change to a normal python install

---------

Co-authored-by: e-koch <[email protected]>

Author: keflavich

.github/workflows/main.yml

@@ -42,7 +42,7 @@ jobs:
           - os: ubuntu-latest
             python-version: 3.9
             name: Py3.9 all
-            toxenv: py39-test-viz-noviz-docs
+            toxenv: py39-test-viz-noviz
           - os: ubuntu-latest
             python-version: 3.9
             name: Py3.9 dev
@@ -58,7 +58,7 @@ jobs:
           - os: ubuntu-latest
             python-version: 3.9
             name: Py3.9 all dev
-            toxenv: py39-test-viz-noviz-docs-dev
+            toxenv: py39-test-viz-noviz-dev
           - os: ubuntu-latest
             python-version: 3.8
             name: Py3.8 mindeps and CASA

.readthedocs.yml

@@ -1,11 +1,12 @@
 version: 2
 
 build:
-  image: latest
+  os: "ubuntu-20.04"
+  tools:
+    python: "3.12"
 
 # Install regular dependencies.
 python:
-  version: 3.7
   install:
     - method: pip
       path: .

spectral_cube/spectral_cube.py

@@ -1453,7 +1453,7 @@ def _pix_cen(self):
         lat = np.radians(lat)
 
         # Find the dx and dy arrays
-        from astropy.coordinates.angle_utilities import angular_separation
+        from astropy.coordinates import angular_separation
         dx = angular_separation(lon[:, :-1], lat[:, :-1],
                                 lon[:, 1:], lat[:, :-1])
         dy = angular_separation(lon[:-1, :], lat[:-1, :],
@@ -1541,7 +1541,7 @@ def _pix_size(self):
         lat = np.radians(lat)
 
         # Find the dx and dy arrays
-        from astropy.coordinates.angle_utilities import angular_separation
+        from astropy.coordinates import angular_separation
         dx = angular_separation(lon[:, :-1], lat[:, :-1],
                                 lon[:, 1:], lat[:, :-1])
 
@@ -1561,7 +1561,7 @@ def _pix_size(self):
         lat = np.radians(lat)
 
         # Find the dx and dy arrays
-        from astropy.coordinates.angle_utilities import angular_separation
+        from astropy.coordinates import angular_separation
         dy = angular_separation(lon[:-1, :], lat[:-1, :],
                                 lon[1:, :], lat[1:, :])