[property] Move special_dtypes Definition to dtypes.py

Related to issue #318.

Author: fschrader1992

odml/dtypes.py

@@ -62,6 +62,8 @@ def default_values(dtype):
 
 _dtype_map = {'str': 'string', 'bool': 'boolean'}
 
+special_dtypes = ["url", "person", "text"]
+
 
 def infer_dtype(value):
     dtype = (type(value)).__name__

odml/property.py

@@ -587,10 +587,9 @@ def extend(self, obj, strict=True):
             return
 
         new_value = self._convert_value_input(obj)
-        special_dtypes = ["url", "person", "text"]
         if len(new_value) > 0 and strict and dtypes.infer_dtype(new_value[0]) != self.dtype:
 
-            if not (dtypes.infer_dtype(new_value[0]) == "string" and self.dtype in special_dtypes):
+            if not (dtypes.infer_dtype(new_value[0]) == "string" and self.dtype in dtypes.special_dtypes):
                 raise ValueError("odml.Property.extend: "
                                  "passed value data type does not match dtype!")
 
@@ -620,10 +619,9 @@ def append(self, obj, strict=True):
         if len(new_value) > 1:
             raise ValueError("odml.property.append: Use extend to add a list of values!")
 
-        special_dtypes = ["url", "person", "text"]
         if len(new_value) > 0 and strict and dtypes.infer_dtype(new_value[0]) != self.dtype:
 
-            if not (dtypes.infer_dtype(new_value[0]) == "string" and self.dtype in special_dtypes):
+            if not (dtypes.infer_dtype(new_value[0]) == "string" and self.dtype in dtypes.special_dtypes):
                 raise ValueError("odml.Property.append: "
                                  "passed value data type does not match dtype!")