def clean(self, py_value):
try:<EOL><INDENT>from webhelpers.text import strip_tags<EOL>return strip_tags(py_value)<EOL><DEDENT>except ImportError:<EOL><INDENT>warnings.warn('<STR_LIT>')<EOL>return py_value<EOL><DEDENT>
Cleans the value before storing it.

:param:     py_value : <str>

:return:    <str>