regexTests.py 文件源码

def get_fitness(genes, wanted, unwanted):
    pattern = repair_regex(genes)
    length = len(pattern)

    try:
        re.compile(pattern)
    except re.error as e:
        key = str(e)
        key = key[:key.index("at position")]
        info = [str(e),
                "genes = ['{}']".format("', '".join(genes)),
                "regex: " + pattern]
        if key not in regexErrorsSeen or len(info[1]) < len(
                regexErrorsSeen[key][1]):
            regexErrorsSeen[key] = info
        return Fitness(0, len(wanted), len(unwanted), length)

    numWantedMatched = sum(1 for i in wanted if re.fullmatch(pattern, i))
    numUnwantedMatched = sum(1 for i in unwanted if re.fullmatch(pattern, i))
    return Fitness(numWantedMatched, len(wanted), numUnwantedMatched,
                   length)