[HDF5TomoScan] add "start_time" and "end_time" properties

tomoscan/esrf/hdf5scan.py

@@ -109,6 +109,10 @@ class HDF5TomoScan(TomoScanBase):
 
     _ENERGY_PATH = "beam/incident_energy"
 
+    _START_TIME_PATH = "start_time"
+
+    _END_TIME_START = "end_time"
+
     _SCHEME = "silx"
 
     _EPSILON_ROT_ANGLE = 0.02
@@ -178,6 +182,8 @@ class HDF5TomoScan(TomoScanBase):
         self._fov = None
         self._energy = None
         self._estimated_cor_frm_motor = None
+        self._start_time = None
+        self._end_time = None
 
     @staticmethod
     def get_master_file(scan_path):
@@ -695,6 +701,28 @@ class HDF5TomoScan(TomoScanBase):
                 self._energy = self._get_value(energy_dataset, default_unit="keV")
         return self._energy
 
+    @property
+    def start_time(self):
+        if self._start_time is None and self.master_file and os.path.exists:
+            self._check_hdf5scan_validity()
+            with HDF5File(self.master_file, "r", swmr=True) as h5_file:
+                if self._START_TIME_PATH in h5_file[self._entry]:
+                    self._start_time = h5py_read_dataset(
+                        h5_file[self._entry][self._START_TIME_PATH]
+                    )
+        return self._start_time
+
+    @property
+    def end_time(self):
+        if self._end_time is None and self.master_file and os.path.exists:
+            self._check_hdf5scan_validity()
+            with HDF5File(self.master_file, "r", swmr=True) as h5_file:
+                if self._END_TIME_START in h5_file[self._entry]:
+                    self._end_time = h5py_read_dataset(
+                        h5_file[self._entry][self._END_TIME_START]
+                    )
+        return self._end_time
+
     @property
     def frames(self) -> typing.Union[None, tuple]:
         """return tuple of frames. Frames contains """