def fetch_ensembl_exons(build='<STR_LIT>'):
LOG.info("<STR_LIT>", build)<EOL>if build == '<STR_LIT>':<EOL><INDENT>url = '<STR_LIT>'<EOL><DEDENT>else:<EOL><INDENT>url = '<STR_LIT>'<EOL><DEDENT>dataset_name = '<STR_LIT>'<EOL>dataset = pybiomart.Dataset(name=dataset_name, host=url)<EOL>attributes = [<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>',<EOL>'<STR_LIT>'<EOL>]<EOL>filters = {<EOL>'<STR_LIT>': CHROMOSOMES,<EOL>}<EOL>result = dataset.query(<EOL>attributes = attributes,<EOL>filters = filters<EOL>)<EOL>return result<EOL>
Fetch the ensembl genes

    Args:
        build(str): ['37', '38']