allow to convert numpy arrays to ArrayOf

accept all sequences instead of just tuple / list
+ change Module.announceUpdate to convert value before
  comparing with previous one (comparing will not work with numpy arrays)

Change-Id: I5eceef4297607107e2dde688af2833d3651a8775
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/28525
Tested-by: Markus Zolliker <markus.zolliker@psi.ch>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop/datatypes.py

@@ -760,7 +760,7 @@ class ArrayOf(DataType):
 
     def __call__(self, value):
         """validate an external representation to an internal one"""
-        if isinstance(value, (tuple, list)):
+        try:
             # check number of elements
             if self.minlen is not None and len(value) < self.minlen:
                 raise BadValueError(
@@ -771,8 +771,9 @@ class ArrayOf(DataType):
                     'Array too big, holds at most %d elements!' % self.minlen)
             # apply subtype valiation to all elements and return as list
             return tuple(self.members(elem) for elem in value)
-        raise BadValueError(
-            'Can not convert %s to ArrayOf DataType!' % repr(value))
+        except TypeError:
+            raise BadValueError('%s can not be converted to ArrayOf DataType!'
+                                % type(value).__name__) from None
 
     def export_value(self, value):
         """returns a python object fit for serialisation"""