replace natsorted with sorted for file caches

with sorted the files will be sort by the timestamp, not the file names

olaf/common/oresat_file.py

@@ -7,7 +7,7 @@
 
 def new_oresat_file(keyword: str, card: str = "", date: float = -1.0, ext: str = "") -> str:
     """
-    Convience function for making valid oresat file_names
+    Convenience function for making valid oresat file names.
 
     Parameters
     ----------

olaf/common/oresat_file_cache.py

@@ -7,7 +7,6 @@
 from pathlib import Path
 from threading import Lock
 
-from . import natsorted
 from .oresat_file import OreSatFile
 
 
@@ -37,7 +36,7 @@ def __init__(self, dir_path: str):
                 self._data.append(oresat_file)
             except Exception:  # pylint: disable=W0718
                 remove(self._dir + f)  # invalid file name
-        self._data = natsorted(self._data)
+        self._data = sorted(self._data)
 
     def __len__(self) -> int:
         with self._lock:
@@ -78,7 +77,7 @@ def add(self, file_path: str, consume: bool = False):
 
             if not overwrite:
                 self._data.append(oresat_file)
-                self._data = natsorted(self._data)
+                self._data = sorted(self._data)
 
     def remove(self, file_name: str):
         """Remove a file from cache

tests/internals/resources/test_fread.py

@@ -6,7 +6,7 @@
 import unittest
 from os.path import basename
 
-from olaf import natsorted, new_oresat_file
+from olaf import new_oresat_file
 from olaf._internals.resources.fread import FreadResource
 
 from . import MockApp
@@ -88,7 +88,7 @@ def test_read(self):
         self.assertEqual(self.app.sdo_read(index, subindex_file_data).decode(), file_data2)
         self.assertEqual(self.app.sdo_read(index, subindex_len), 2)
         file_names = json.loads(self.app.sdo_read(index, subindex_files_json))
-        self.assertListEqual(file_names, natsorted([file_name, file_name2]))
+        self.assertListEqual(file_names, [file_name, file_name2])
 
         # delete the first file
         self.app.sdo_write(index, subindex_file_name, basename(file_name))

tests/internals/resources/test_fwrite.py

@@ -7,7 +7,7 @@
 from os import remove
 from os.path import basename
 
-from olaf import natsorted, new_oresat_file
+from olaf import new_oresat_file
 from olaf._internals.resources.fwrite import FwriteResource
 
 from . import MockApp
@@ -77,7 +77,7 @@ def test_write(self):
         self.assertEqual(len(self.app.node.fwrite_cache), 2)
         self.assertEqual(self.app.sdo_read(index, subindex_len), 2)
         file_names = json.loads(self.app.sdo_read(index, subindex_files_json))
-        self.assertListEqual(file_names, natsorted([file_name, file_name2]))
+        self.assertListEqual(file_names, [file_name, file_name2])
 
         # remove test file
         remove(file_path2)