Merge pull request #2832 from pnuu/fsfile-public-fs-property

Add a read-only FSFile.fs property

satpy/readers/__init__.py

@@ -710,6 +710,11 @@ def __repr__(self):
         """Representation of the object."""
         return '<FSFile "' + str(self._file) + '">'
 
+    @property
+    def fs(self):
+        """Return the underlying private filesystem attribute."""
+        return self._fs
+
     def open(self, *args, **kwargs):  # noqa: A003
         """Open the file.
 

satpy/tests/test_readers.py

@@ -1102,6 +1102,18 @@ def test_hash(self, local_filename, local_filename2, local_zip_file):
                     for fn in {local_filename, local_filename2}
                     for fs in [None, lfs, zfs, cfs]}) == 2 * 4
 
+    def test_fs_property_read(self, local_filename):
+        """Test reading the fs property of the class."""
+        fsf = FSFile(local_filename)
+        fs = fsf.fs
+        assert fs is None
+
+    def test_fs_property_is_read_only(self, local_filename):
+        """Test that the fs property of the class is read-only."""
+        fsf = FSFile(local_filename)
+        with pytest.raises(AttributeError):
+            fsf.fs = "foo"
+
 
 def test_open_file_or_filename_uses_mode(tmp_path):
     """Test that open_file_or_filename uses provided mode."""