Update docstring LiveTimeSlice

Author: jacobbieker

ocf_datapipes/select/select_live_time_slice.py

@@ -19,12 +19,22 @@ def __init__(
         history_duration: timedelta,
         dim_name: str = "time_utc",
     ):
+        """
+        Select the history for the live time slice
+
+        Args:
+            source_datapipe: Datapipe emitting Xarray object
+            t0_datapipe: Datapipe emitting t0 timestamps
+            history_duration: Amount of time for the history
+            dim_name: Time dimension name
+        """
         self.source_datapipe = source_datapipe
         self.t0_datapipe = t0_datapipe
         self.history_duration = np.timedelta64(history_duration)
         self.dim_name = dim_name
 
     def __iter__(self):
+        """Select the recent live data"""
         for xr_data, t0 in Zipper(self.source_datapipe, self.t0_datapipe):
             xr_data = xr_data.sel({self.dim_name: slice(t0 - self.history_duration, t0)})
             yield xr_data