CODEWITHSUNDEEP
pythonpython-3.x
user1390672
user1390672

Reputation: 59

passing a string with multiple arguments

I'm new to python. I'm using python 3.1.2 I've to communicate to the xml-rpc server through my code. From my code, I'm calling the client.py that will in-turn connect to the server to get the lists of comments from the server.

The working code:

class xmlrpc:
    def connect(self, webaddr):
        self.server = ServerProxy(webaddr)

Listing the method:-

my_list = self.server.tests.getTests()

the above method is working, but, whereas i've constraint to set the tests.getTests() into a single cmd_str like below 

my_list = self.server.cmd_str

in this case, cmd_str sent to the client.py as a string itself and not like other one. Could anyone pls help me how to acheive this?

Upvotes: 3

Views: 320

Answers (2)

Valdir Stumm Junior
Valdir Stumm Junior

Reputation: 4667

If I understood it right, what you need is to call a method which you have only the name in a string, not a reference to the method itself.

You could use the getattr function to get a reference to the method you want to call.

Using it in your example:

cmdStr = "isRunning" 
func = getattr(Server, cmdStr)
test = func()

Upvotes: 0

Manuel Ebert
Manuel Ebert

Reputation: 8509

If I understand you right, you want to call a method of an object, but you don't know the method in advance, you just have it in a string. Is that correct?

class Server(object): 
    def isRunning(self): 
        print("you are inside the isRunning")

my_server = Server()
cmd_str = "isRunning"
my_function = my_server.__getattribute__(cmd_str)
my_function()

you are inside the isRunning

Note that I let the Server class inherit from object to make it a so-called new-style class, and that isRunning gets an argument self, which tells python that this should be an instance method. my_server.__getattribute__ will get a reference to the bound function my_server.isRunning, which you then call.

You could also do something like this:

function_map = {
    'check_if_running': my_server.isRunning
}
cmd_str = 'check_if_running'
my_function = function_map[cmd_str]
my_function()

so you don't have to name your functions exactly the way that your command strings are called (in python, the naming convention for methods is generally like_this, not likeThis)

Upvotes: 1

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