如何使用argparse Python将'='用作参数分隔符？

Question

I want to use '=' as argument separator and didn't get any option in library documentation. So, '=' supported as a argument separator/deliminator by argparse.

class Parse:
    def __init__(self):
        parser = argparse.ArgumentParser()
        parser.add_argument("script_config",help="Script Config File")
        parser.add_argument("devices",help="devices")
        parser.add_argument("log_file",help="log_file")
        parser.add_argument("result_file",help="result_file")
        parser.add_argument("testbed_file",help="testbed_file")
        parser.add_argument("runtime",help="Just Runetime")
        args = parser.parse_args()
        print pprint.pprint(args)

a=Parse()

Output to above code, Here I got runtime as runtime=10 .

 root@ip-:~/cloudzelera/$ python  ../lib/TestsuiteOption.py /tmp/abc.conf qa05__lnx1__i-12b651ea /tmp/123.suite /tmp/result.tmp /tmp/config runtime=10
Namespace(devices='qa05__lnx1__i-12b651ea', log_file='/tmp/123.suite', result_file='/tmp/result.tmp', runtime='runtime=10', script_config='/tmp/abc.conf', testbed_file='/tmp/config')
None

Answer 1

runtime is not an optional argument, it is a required, positional argument. As such you'd never use the name on the command line:

TestsuiteOption.py /tmp/abc.conf qa05__lnx1__i-12b651ea /tmp/123.suite /tmp/result.tmp /tmp/config 10

If you want runtime to be optional, start the option with two dashes (for a long name):

parser.add_argument("--runtime", help="Just Runtime")

and use the same on the command line:

TestsuiteOption.py /tmp/abc.conf --runtime=10 qa05__lnx1__i-12b651ea /tmp/123.suite /tmp/result.tmp /tmp/config

Now the option can be used anywhere on the command line, including at the start.

Note that argparse uses the UNIX convention of command line arguments, where optional arguments start with - for short 1-character arguments, -- for long arguments. It is not suitable for other conventions.

Answer 2

鉴于您指定的内容不符合Unix参数解析约定，为什么要在末尾添加另一行：

args.runtime = args.runtime.split('=')[1]