[io] improve raise error message

est/io/io.py

@@ -244,7 +244,7 @@ def read_xas(information, timeout=settings.DEFAULT_READ_TIMEOUT):
                 url_ = DataUrl(file_path=url_, scheme="PyMca")
 
         if not isinstance(url_, DataUrl):
-            raise TypeError("given input for, {} is invalid".format(name))
+            raise TypeError("given input for {} is invalid ({})".format(name, url_))
         return url_
 
     _spectra_url = get_url(original_url=information.spectra_url, name="spectra")