Question

我逐行读取文件，这是我需要在python中实现的条件（如下）我该怎么做

如果行以'＆lt;'开头继续或浏览文件中的行直到该行以'＆lt;'开头然后程序可以继续

keyword = "TrapQueueCounter"

count = 0

LastLine=''


def get_last_date():
    try:
        with open('last_date.txt') as last_date_file:
            last_date_str = last_date_file.read().strip()
            return datetime.datetime.strptime(last_date_str, '%Y-%m-%d %H:%M:%S %f')
    except IOError:
        #return a date before anything in the logs
        return datetime.datetime.strptime('1990-01-01 00:00:00 000000', '%Y-%m-%d %H:%M:%S %f')


def set_last_date(t):

    with open('last_date.txt', 'w') as last_date_file:
        last_date_str = t.strftime('%Y-%m-%d %H:%M:%S %f')
        last_date_file.write(last_date_str)


t0 = get_last_date()

for logpath in glob.glob('/*.log'):
    #loop through all the files

    print ('logpath:',logpath)
    with open(logpath, 'r') as logfile:
        for line in logfile:
            line = line.strip()
            if line.startswith('<'): //this is where iam stuck..
                continue
            datepart,_,_ = line.partition('>')
            datepart = datepart[1:]

            date, time, ms, tz = datepart.split(' ')

            year,month,day = date.split('.')
            hour,minute,second = time.split(':')

            year,month,day = int(year), int(month), int(day)
            hour,minute,second = int(hour), int(minute), int(second)
            ms = int(ms)

            t = datetime.datetime(year=year, month=month, day=day
                            , hour=hour, minute=minute, second=second
                            , microsecond=ms*1000.0)

            if t < t0:
                continue


            #line = line.lower()
            count += line.count(keyword)

            set_last_date(t)


            if keyword in line:
                message1 = 'Counted %s %s times in %s line' % (repr(keyword), count, line)
                LastLine=line
                print message1

仅当行在开始日期，时间，ms，tz = datepart.split（''）中采用此格式时，才会读取该文件。但我希望它只在行以'＆lt;'开头时读取该行但如果该行以任何其他字符开头，我希望它跳过，直到它遇到以'＆lt;'开头的另一行。我该怎么做。谢谢

Answer 1

begin = False
with open(filename, 'r') as fid:
    line = fid.readline()
    if line.startwith('<'):
        begin = True
    if begin:
        do_something()

Python程序卡在循环上

1 个答案: