initial protection against empty response from get_enrolled_fingers

1 files changed, 10 insertions, 1 deletions

diff --git a/fprintd_tk.py b/fprintd_tk.py
index 3e815a6..a2cfd99 100755
--- a/fprintd_tk.py
+++ b/fprintd_tk.py
@@ -100,7 +100,16 @@ class App(tk.Frame):
    def load_data_into_form(self):
       time.sleep(0.05)
       # WORKHERE: if the fprintd-list fails because the device is open, we will want to keep the old enrolled_fingers list. maybe check if statustext contains "failed to open" or whatever the message is. if it does, do not update the self.enrolled_fingers?
-      self.enrolled_fingers = lib.get_enrolled_fingers()
+      try:
+         self.old_enrolled_fingers = self.enrolled_fingers
+      except:
+         # will happen if self.enrolled_fingers is not present
+         self.old_enrolled_fingers = []
+      temp1 = lib.get_enrolled_fingers()
+      if temp1:
+         self.enrolled_fingers = temp1
+      else:
+         print(f"DEBUG (load_data_into_form): having to skip empty response from get_enrolled_fingers")
       print(f"DEBUG (load_data_into_form): got enrolled fingers {self.enrolled_fingers}")
       for i in self.fingers:
          if str(i.cget('text')) in self.enrolled_fingers: