Production separators on multiple lines about ponyge2 HOT 5 CLOSED

from re import finditer, DOTALL, MULTILINE

    ruleregex = '(?P<rulename><\S+>)\s*::=\s*(?P<production>(?:(?=\#)\#[^\r\n]*|(?!<\S+>\s*::=).+?)+)'
    productionregex = '(?=\#)(?:\#.*$)|(?!\#)\s*(?P<production>(?:[^\'\"\|\#]+|\'.*?\'|".*?")+)'
    productionpartsregex = '\ *([\r\n]+)\ *|([^\'"<\r\n]+)|\'(.*?)\'|"(.*?)"|(?P<subrule><[^>|\s]+>)|([<]+)'

    def read_bnf_file(self, file_name):
        with open(file_name, 'r') as bnf:
            content = bnf.read()
            for rule in finditer(self.ruleregex, content, DOTALL):
                if self.start_rule is None:
                    self.start_rule = (rule.group('rulename'), self.NT)
                self.non_terminals[rule.group('rulename')] = {'id': rule.group('rulename'),
                                                              'min_steps': 9999999999999,
                                                              'expanded': False,
                                                              'recursive': True,
                                                              'permutations': None,
                                                              'b_factor': 0}
                tmp_productions = []
                for p in finditer(self.productionregex, rule.group('production'), MULTILINE):
                    if p.group('production') is None or p.group('production').isspace():
                        continue
                    tmp_production = []
                    terminalparts = ''
                    for sub_p in finditer(self.productionpartsregex, p.group('production').strip()):
                        if sub_p.group('subrule'):
                            if terminalparts:
                                symbol = [terminalparts, self.T, 0, False]
                                tmp_production.append(symbol)
                                self.terminals.append(terminalparts)
                                terminalparts = ''
                            tmp_production.append([sub_p.group('subrule'), self.NT])
                        else:
                            terminalparts += ''.join([part for part in sub_p.groups() if part])

                    if terminalparts:
                        symbol = [terminalparts, self.T, 0, False]
                        tmp_production.append(symbol)
                        self.terminals.append(terminalparts)
                    tmp_productions.append(tmp_production)

                if not rule.group('rulename') in self.rules:
                    self.rules[rule.group('rulename')] = tmp_productions
                    if len(tmp_productions) == 1:
                        print("Warning: Grammar contains unit production "
                              "for production rule", rule.group('rulename'))
                        print("       Unit productions consume GE codons.")
                else:
                    raise ValueError("lhs should be unique", rule.group('rulename'))