def find_helping_materials(project_id, **kwargs):
try:<EOL><INDENT>kwargs['<STR_LIT>'] = project_id<EOL>res = _pybossa_req('<STR_LIT>', '<STR_LIT>', params=kwargs)<EOL>if type(res).__name__ == '<STR_LIT:list>':<EOL><INDENT>return [HelpingMaterial(helping) for helping in res]<EOL><DEDENT>else:<EOL><INDENT>return res<EOL><DEDENT><DEDENT>except:  <EOL><INDENT>raise<EOL><DEDENT>
Return a list of matched helping materials for a given project ID.

    :param project_id: PYBOSSA Project ID
    :type project_id: integer
    :param kwargs: PYBOSSA HelpingMaterial members
    :type info: dict
    :rtype: list
    :returns: A list of helping materials that match the kwargs