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From: Rodrick Brown <rodrick.brown@gmail.com>
Date: Wed, 9 Jan 2013 15:13:30 -0500
Subject: Class confusion
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How can I make a class that has methods with attributes and other
functions?

I see a lot of code


I'm reading the documentation to Redhat's Satellite software which has a
XMLRPC interface and wrote the following code to test the api.

I would like to extend this code to support methods with methods? I see
this done a lot in python code but I'm not sure how to accomplish something
like this?

i.e.

sc = SatelliteConnect()
sc.get_systemlist().get_systemid() ?
or
sc.get_systemlist().get_running_kernel()

How does one chain methods and attributes like this with classes?

import xmlrpclib
import os
import sys

class SatelliteConnect(object):

    SATELLITE_URL = "http://nebula.nydc.fxcorp.prv/rpc/api"
    SATELLITE_LOGIN = os.environ['USER']
    SATELLITE_PASS = os.environ.get('SATELLITE_PASS',None)

    def __init__(self):
        self.client = xmlrpclib.Server(self.SATELLITE_URL, verbose=0)
        self._check_env('SATELLITE_PASS')
        self.key = self.client.auth.login(self.SATELLITE_LOGIN,
self.SATELLITE_PASS)

    def _check_env(self, env_var):
        if not os.environ.get('SATELLITE_PASS'):
            print("{} error please set environment varible {} and
re-run script".format(sys.argv[0], env_var))

            sys.exit(-1)

    def get_runningkernel(self, sysid):
        self.get_systemid('somehost')
        kernel = self.client.system.getRunningKernel(self.key, sysid)
        if kernel:

            return kernel
        else:
            return None


    def get_systemlist(self):
        systemlist = self.client.system.listSystems(self.key)
        return([ system.get('name') for system in systemlist ])

        self.client.auth.logout(self.key)

    def get_systemid(self, host):
        systemlist = self.client.system.getId(self.key, host)
        for system in systemlist:
            return system.get('id')

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<div dir=3D"ltr">How can I make a class that has methods with attributes an=
d other functions?=A0<div>=A0<div style>I see a lot of code</div><div><br><=
/div><div><br></div><div style>I&#39;m reading the documentation to Redhat&=
#39;s Satellite software which has a XMLRPC interface and wrote the followi=
ng code to test the api.=A0</div>

<div style><br></div><div style>I would like to extend this code to support=
 methods with methods? I see this done a lot in python code but I&#39;m not=
 sure how to accomplish something like this?=A0</div><div style><br></div>

<div style>i.e.=A0</div><div style><br></div><div style>sc =3D SatelliteCon=
nect()</div><div style>sc.get_systemlist().get_systemid() ?=A0</div><div st=
yle>or=A0</div><div style>sc.get_systemlist().get_running_kernel()=A0</div>=
<div style>

<br></div><div style>How does one chain methods and attributes like this wi=
th classes?=A0</div><div style><br></div><div><pre style=3D"color:rgb(0,0,0=
)">import xmlrpclib<br>import os<br>import sys<br><br>class SatelliteConnec=
t(object):<br>

    SATELLITE_URL =3D &quot;<a href=3D"http://nebula.nydc.fxcorp.prv/rpc/ap=
i">http://nebula.nydc.fxcorp.prv/rpc/api</a>&quot;<br>    SATELLITE_LOGIN =
=3D os.environ[&#39;USER&#39;]<br>    SATELLITE_PASS =3D os.environ.get(=
9;SATELLITE_PASS&#39;,None)<br>

<br>    def __init__(self):<br>        self.client =3D xmlrpclib.Server(sel=
f.SATELLITE_URL, verbose=3D0)<br>        self._check_env(&#39;SATELLITE_PAS=
S&#39;)<br>        self.key =3D self.client.auth.login(self.SATELLITE_LOGIN=
, self.SATELLITE_PASS)<br>

<br>    def _check_env(self, env_var):<br>        if not os.environ.get(=
9;SATELLITE_PASS&#39;):<br>            print(&quot;{} error please set envi=
ronment varible {} and re-run script&quot;.format(sys.argv[0], env_var))<br=
>

            sys.exit(-1)</pre><pre style=3D"color:rgb(0,0,0)">    def get_r=
unningkernel(self, sysid):
        self.get_systemid(&#39;somehost&#39;)
        kernel =3D self.client.system.getRunningKernel(self.key, sysid)
        if kernel:=A0</pre><pre style=3D"color:rgb(0,0,0)">            retu=
rn kernel
        else:
            return None</pre><pre style=3D"color:rgb(0,0,0)"><br>    def ge=
t_systemlist(self):<br>        systemlist =3D self.client.system.listSystem=
s(self.key)<br>        return([ system.get(&#39;name&#39;) for system in sy=
stemlist ])<br>

<br>        self.client.auth.logout(self.key)<br><br>    def get_systemid(s=
elf, host):<br>        systemlist =3D self.client.system.getId(self.key, ho=
st)<br>        for system in systemlist:<br>            return system.get(&=
#39;id&#39;)<br>

<br><br></pre></div></div></div>

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