Make the data member of SharedArray more robust by adding a setter. This...

Make the data member of SharedArray more robust by adding a setter. This setter checks that the variable to be assigned is indeed a ctypes.Array. This prevents from accidentally erasing data with a Numpy array for instance.

pcigale/managers/utils.py

@@ -35,12 +35,19 @@ class SharedArray(object):
     """
     def __init__(self, shape):
         self._shape = shape
-        self._data = RawArray(ctypes.c_double, int(np.product(self._shape)))
+        self.data = RawArray(ctypes.c_double, int(np.product(self._shape)))
 
     @property
     def data(self):
         return np.ctypeslib.as_array(self._data).reshape(self._shape)
 
+    @data.setter
+    def data(self, data):
+        if isinstance(data, ctypes.Array):
+            self._data = data
+        else:
+            raise TypeError("Type must be RawArray.")
+
     @property
     def shape(self):
         return self._shape