Update phase/compute.py

added input validation for 'participants_by_group'

phase/compute.py

@@ -26,6 +26,9 @@ class ParticipationAdoptionIndex:
             
     # ---------- public API ----------
     def compute_pai(self, participants_by_group=None):
+
+        # input validation for 'participants_by_group'
+        self.num_participants = sum(participants_by_group.values()) if participants_by_group else num_participants
         
         # absolute counts
         spi_a_abs = self.target_population - self.num_participants