python - 记录器找不到文件

Question

当我输入这个命令时出现这个错误:

$ python3.4 cron_e2e.py -f test_web_events -E ctg-clickstream testbrad

错误:

$ python3.4 cron_e2e.py -f test_web_events -E ctg-clickstream testbrad
Traceback (most recent call last):
  File "cron_e2e.py", line 421, in <module>
    sys.exit(main(sys.argv))
  File "cron_e2e.py", line 368, in main
    log.addHandler(logging.FileHandler(logfile))
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/logging/__init__.py", line 1006, in __init__
    StreamHandler.__init__(self, self._open())
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/logging/__init__.py", line 1030, in _open
    return open(self.baseFilename, self.mode, encoding=self.encoding)
FileNotFoundError: [Errno 2] No such file or directory: '/Users/bli1/Development/QE/chun-qe-trinity-functional/qe/tests/qe/logs/testbrad_8_21_2015_cron.log'

错误发生在这一行:

log.addHandler(logging.FileHandler(logfile))

不太确定我的代码在哪里没有为我创建日志文件

代码:

def main(argv):
    "Test"
    exit_code = 0
    global me; me = os.path.basename(argv[0]) # name of this program
    global mydir; mydir = os.path.dirname(os.path.abspath(__file__))
    parser = argparse.ArgumentParser(description=main.__doc__)
    parser.add_argument("-f", "--functional_test", metavar="FUNCTEST",
                        dest="functest", help="Type of functional test")
    parser.add_argument("-p","--phase", action="append",
                        metavar="POST|HDFS|HIVE|ALL", dest="phase",
                        help="phase of test to run")
    parser.add_argument("-t", "--testfile", metavar="TESTFILE",
                        dest="testfile", default=os.path.join(mydir, "resources/cron.json"),
                        help="file with test commands")
    parser.add_argument("-E","--Event", metavar="EVENTNAME",
                        dest="event_names", action="append",
                        help="[repeatable] topic to which to post")
    parser.add_argument("runtag",
                        metavar="RUNTAG",
                        help="run tag for this run")
    args = parser.parse_args(args=argv[1:])  # will exit on parse error
    log = logging.getLogger(me)
    log.setLevel(logging.INFO)
    dt = datetime.datetime.utcnow()
    logfile = "qe/logs/" + (args.runtag + "_{}_{}_{}".format(dt.month, dt.day, dt.year) + "_cron.log")

    pdb.set_trace()
    if isinstance(logfile, str):
        if os.path.exists(logfile):
            os.remove(logfile)
        # logging.FileHandler() returns FileHandler class, the file is opened and used as the stream for logging
        log.addHandler(logging.FileHandler(logfile))
    console = logging.StreamHandler(sys.stderr); console.setLevel(logging.WARNING); log.addHandler(console)

Answer 1

问题是您定义要转到的日志文件的目录 - "qe/logs/" - 不存在。

默认模式为 FileHandler是 'a' ，这意味着如果日志文件存在，它会打开它并在末尾开始附加到它，否则它会创建文件。

但是 FileHandler 只会在日志文件不存在时创建日志文件，如果目录不存在则不会创建目录，如果目录不存在，它会像您遇到的那样抛出错误。

您需要自己手动或以编程方式创建目录。如果要以编程方式创建目录，可以使用 - os.makedirs() - 这会 -

create all intermediate-level directories needed to contain the leaf directory.

例子-

import os, os.path
if not os.path.exists("qe/logs/"):
    os.makedirs("qe/logs/")