def get_signatures(self):
signature_expr = re.compile("<STR_LIT>")<EOL>signature_datas = []<EOL>for i in self.get_files():<EOL><INDENT>if signature_expr.search(i):<EOL><INDENT>signature_datas.append(self.get_file(i))<EOL><DEDENT><DEDENT>if len(signature_datas) > <NUM_LIT:0>:<EOL><INDENT>return signature_datas<EOL><DEDENT>return None<EOL>
Return a list of the data of the signature files.