<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_content_type(self, content_type):
 """ Set content-type policy condition. :param content_type: set content type name. """

        self.policies.append(('eq', '$Content-Type', content_type))
        self.form_data['Content-Type'] = content_type