improved itype warning text

dios/lib.py

@@ -283,13 +283,16 @@ dios_options = {
 
 
 def _throw_MixedItype_err_or_warn(itype):
-    msg = f"'{itype}'. Using a non-unique Itype for a DictOfSeries, is not recommend. " \
-          f"As soon as series \nwith different index types are inserted, selecting and slicing data will " \
-          f"almost always fail. You are hereby warned!"
+    msg = f"Using '{itype.name}' as itype is not recommend. " \
+          f"As soon as series with different index types are inserted,\n" \
+          f"indexing and slicing will almost always fail. "
+
     if dios_options[OptsFields.mixed_itype_warn_policy] in ['ignore', Opts.itype_ignore]:
         pass
     elif dios_options[OptsFields.mixed_itype_warn_policy] in ['error', 'err', Opts.itype_err]:
+        msg += "Suppress this error by specifying an unitary 'itype' or giving an 'index' to DictOfSeries."
         raise ItypeCastError(msg)
     else:
+        msg += "Silence this warning by specifying an unitary 'itype' or giving an 'index' to DictOfSeries."
         warnings.warn(msg, ItypeWarning)
     return