some enum class methods for mapping between sc fields, res fields, an…

…d site fields. Dictionary of "old" names used to rename test data to match current sc names. bespoke tests mostly passing.

reV/SAM/SAM.py

@@ -28,6 +28,7 @@
 )
 from rex.utilities.utilities import check_res_file
 
+from reV.utilities import ResourceMetaField
 from reV.utilities.exceptions import (
     ResourceError,
     SAMExecutionError,
@@ -713,7 +714,7 @@ def ensure_res_len(arr, time_index):
 
                 freq = pd.infer_freq(time_index[:s])
                 msg = "frequencies do not match before and after 2/29"
-                assert freq == pd.infer_freq(time_index[s + 1:]), msg
+                assert freq == pd.infer_freq(time_index[s + 1 :]), msg
             else:
                 freq = pd.infer_freq(time_index)
         else:
@@ -796,11 +797,10 @@ def _parse_meta(meta):
             location. Should include values for latitude, longitude, elevation,
             and timezone. Can be None for econ runs.
         """
-
         if isinstance(meta, pd.DataFrame):
             msg = (
-                "Meta data must only be for a single site but received: {}"
-                .format(meta)
+                "Meta data must only be for a single site but received: "
+                f"{meta}"
             )
             assert len(meta) == 1, msg
             meta = meta.iloc[0]
@@ -861,7 +861,9 @@ def outputs_to_utc_arr(self):
 
                     if self._is_hourly(output):
                         n_roll = int(
-                            -1 * self.meta["timezone"] * self.time_interval
+                            -1
+                            * self.meta[ResourceMetaField.TIMEZONE]
+                            * self.time_interval
                         )
                         output = np.roll(output, n_roll)
 
@@ -889,8 +891,9 @@ def collect_outputs(self, output_lookup):
                     bad_requests.append(req)
 
         if any(bad_requests):
-            msg = ('Could not retrieve outputs "{}" from PySAM object "{}".'
-                   .format(bad_requests, self.pysam))
+            msg = 'Could not retrieve outputs "{}" from PySAM object "{}".'.format(
+                bad_requests, self.pysam
+            )
             logger.error(msg)
             raise SAMExecutionError(msg)