with global:
SERVER = None
A the end of Argparse declarations:
parser_check.set_defaults(action=do_the_check)
parser_build.set_defaults(action=do_the_build)
Then declare the action functions:
def do_the_check(namespace_args):
if not SERVER:
SERVER = Server(namespace_arg.type_of_server)
SERVER.check()
def do_the_build(namespace_args):
if not SERVER:
SERVER = Server(namespace_arg.type_of_server)
SERVER.build()
If I correctly understood your issue.
Regards
Karim
On 07/18/2011 03:48 AM, Victor Hooi wrote:
Hi,
I have a simple Python script to perform operations on various types on
in-house servers:
manage_servers.py<operation> <type_of_server>
Operations are things like check, build, deploy, configure, verify etc.
Types of server are just different types of inhouse servers we use.
We have a generic server class, then specific types that inherit from that:
class Server
def configure_logging(self, loggin_file):
...
def check(self):
...
def deploy(self):
...
def configure(self):
...
def __init__(self, hostname):
self.hostname = hostname
logging = self.configure_logging(LOG_FILENAME)
class SpamServer(Server):
def check(self):
...
class HamServer(Server):
def deploy(self):
...
My question is how to link that all up to argparse?
Originally, I was using argparse subparses for the operations (check, build,
deploy) and another argument for the type.
subparsers = parser.add_subparsers(help='The operation that you want to run on
the server.')
parser_check = subparsers.add_parser('check', help='Check that the server has
been setup correctly.')
parser_build = subparsers.add_parser('build', help='Download and build a copy
of the execution stack.')
parser_build.add_argument('-r', '--revision', help='SVN revision to build
from.')
...
parser.add_argument('type_of_server', action='store', choices=types_of_servers,
help='The type of server you wish to create.')
Normally, you'd link each subparse to a method - and then pass in the
type_of_server as an argument. However, that's slightly backwards due to the
classes- I need to create an instance of the appropriate Server class, then
call the operation method inside of that.
Any ideas of how I could achieve the above? Perhaps a different design pattern
for Servers? Or a way to use argparse in this situation?
Thanks,
Victor
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