Fix pylint warnings and errors

This fixes several warnings and errors as reported by pylint.

9 files changed, 72 insertions, 73 deletions

diff --git a/rumba/model.py b/rumba/model.py
index 0659cb1..c8c00ab 100644
--- a/rumba/model.py
+++ b/rumba/model.py
@@ -44,7 +44,7 @@ class Testbed:
 # @name [string] DIF name
 #
 class DIF:
-    def __init__(self, name, members = None):
+    def __init__(self, name, members=None):
         self.name = name
         if members is None:
             members = list()
@@ -62,7 +62,7 @@ class DIF:
         return other != None and self.name == other.name
 
     def __neq__(self, other):
-        return not (self == other)
+        return not self == other
 
     def add_member(self, node):
         self.members.append(node)
@@ -76,7 +76,7 @@ class DIF:
 # Shim over UDP
 #
 class ShimUDPDIF(DIF):
-    def __init__(self, name, members = None):
+    def __init__(self, name, members=None):
         DIF.__init__(self, name, members)
 
     def get_ipcp_class(self):
@@ -87,7 +87,7 @@ class ShimUDPDIF(DIF):
 # @link_speed [int] Speed of the Ethernet network, in Mbps
 #
 class ShimEthDIF(DIF):
-    def __init__(self, name, members = None, link_speed = 0):
+    def __init__(self, name, members=None, link_speed=0):
         DIF.__init__(self, name, members)
         self.link_speed = int(link_speed)
         if self.link_speed < 0:
@@ -101,7 +101,7 @@ class ShimEthDIF(DIF):
 # @policies [dict] Policies of the normal DIF
 #
 class NormalDIF(DIF):
-    def __init__(self, name, members = None, policies = None):
+    def __init__(self, name, members=None, policies=None):
         DIF.__init__(self, name, members)
         if policies is None:
             policies = dict()
@@ -127,10 +127,8 @@ class NormalDIF(DIF):
 # @bindings: Binding of names on the processing system
 #
 class Node:
-    def __init__(self, name, difs = None,
-                 dif_registrations = None,
-                 registrations = None,
-                 bindings = None):
+    def __init__(self, name, difs=None, dif_registrations=None,
+                 registrations=None, bindings=None):
         self.name = name
         if difs is None:
             difs = list()
@@ -208,7 +206,7 @@ class Node:
         return other != None and self.name == other.name
 
     def __neq__(self, other):
-        return not (self == other)
+        return not self == other
 
     def add_dif(self, dif):
         self.difs.append(dif)
@@ -237,11 +235,11 @@ class Node:
         self._validate()
 
     def add_binding(self, name, ap):
-        self.dif_bindings[name] = ap
+        self.bindings[name] = ap
         self._validate()
 
     def del_binding(self, name):
-        del self.dif_bindings[name]
+        del self.bindings[name]
         self._validate()
 
 # Base class representing an IPC Process to be created in the experiment
@@ -276,17 +274,17 @@ class IPCP:
                                 and self.dif == other.dif
 
     def __neq__(self, other):
-        return not (self == other)
+        return not self == other
 
 class ShimEthIPCP(IPCP):
-    def __init__(self, name, node, dif, ifname = None):
+    def __init__(self, name, node, dif, ifname=None):
         IPCP.__init__(self, name, node, dif)
         self.ifname = ifname
 
 class ShimUDPIPCP(IPCP):
     def __init__(self, name, node, dif):
         IPCP.__init__(self, name, node, dif)
-        # TODO add IP and port
+        # TODO: add IP and port
 
 # Base class for ARCFIRE experiments
 #
@@ -294,7 +292,7 @@ class ShimUDPIPCP(IPCP):
 # @nodes: Nodes in the experiment
 #
 class Experiment:
-    def __init__(self, testbed, nodes = None):
+    def __init__(self, testbed, nodes=None):
         if nodes is None:
             nodes = list()
         self.nodes = nodes
@@ -396,7 +394,7 @@ class Experiment:
             for node in self.nodes:
                 if dif in node.dif_registrations:
                     dif_graphs[dif][node] = [] # init for later use
-                    if first == None: # pick any node for later use
+                    if first is None: # pick any node for later use
                         first = node
                     for lower_dif in node.dif_registrations[dif]:
                         if lower_dif not in neighsets:
@@ -413,7 +411,7 @@ class Experiment:
 
             self.enrollments.append([])
 
-            if first == None:
+            if first is None:
                 # This is a shim DIF, nothing to do
                 continue
 
@@ -452,7 +450,7 @@ class Experiment:
 
             else:
                 # This is a bug
-                assert(False)
+                assert False
 
         print("Enrollments:")
         for el in self.enrollments:
@@ -475,8 +473,8 @@ class Experiment:
                     continue
 
                 ipcp = dif.get_ipcp_class()(
-                                name = '%s.%s' % (dif.name, node.name),
-                                node = node, dif = dif)
+                    name='%s.%s' % (dif.name, node.name),
+                    node=node, dif=dif)
 
                 if dif in node.dif_registrations:
                     for lower in node.dif_registrations[dif]:
diff --git a/rumba/prototypes/irati.py b/rumba/prototypes/irati.py
index 90d0861..1babd57 100644
--- a/rumba/prototypes/irati.py
+++ b/rumba/prototypes/irati.py
@@ -23,7 +23,7 @@ import rumba.model as mod
 
 # An experiment over the IRATI implementation
 class Experiment(mod.Experiment):
-    def __init__(self, testbed, nodes = None):
+    def __init__(self, testbed, nodes=None):
         mod.Experiment.__init__(self, testbed, nodes)
 
     def setup(self):
@@ -31,7 +31,7 @@ class Experiment(mod.Experiment):
 
         cmds.append("sudo apt-get update")
         cmds.append("sudo apt-get install g++ gcc "
-                          "protobuf-compiler libprotobuf-dev git --yes")
+                    "protobuf-compiler libprotobuf-dev git --yes")
         cmds.append("sudo rm -rf ~/irati")
         cmds.append("cd && git clone https://github.com/IRATI/stack irati")
         cmds.append("cd ~/irati && sudo ./install-from-scratch")
@@ -39,7 +39,7 @@ class Experiment(mod.Experiment):
 
         for node in self.nodes:
             ssh.execute_commands(self.testbed, node.full_name,
-                                 cmds, time_out = None)
+                                 cmds, time_out=None)
 
     def run(self):
         print("[IRATI experiment] start")
diff --git a/rumba/prototypes/ouroboros.py b/rumba/prototypes/ouroboros.py
index 4359f19..57358cf 100644
--- a/rumba/prototypes/ouroboros.py
+++ b/rumba/prototypes/ouroboros.py
@@ -23,7 +23,7 @@ import rumba.model as mod
 
 # An experiment over the Ouroboros implementation
 class Experiment(mod.Experiment):
-    def __init__(self, testbed, nodes = None):
+    def __init__(self, testbed, nodes=None):
         mod.Experiment.__init__(self, testbed, nodes)
 
     def setup_ouroboros(self):
@@ -36,7 +36,8 @@ class Experiment(mod.Experiment):
         cmds.append("sudo nohup irmd > /dev/null &")
 
         for node in self.nodes:
-            ssh.execute_commands(self.testbed, node.full_name, cmds, time_out = None)
+            ssh.execute_commands(self.testbed, node.full_name,
+                                 cmds, time_out=None)
         return
 
     def bind_names(self):
@@ -45,7 +46,8 @@ class Experiment(mod.Experiment):
             for name, ap in node.bindings.items():
                 cmds.append("irm b ap " + ap + " n " + name)
 
-            ssh.execute_commands(self.testbed, node.full_name, cmds, time_out = None)
+            ssh.execute_commands(self.testbed, node.full_name,
+                                 cmds, time_out=None)
 
     def run(self):
         print("[Ouroboros experiment] start")
diff --git a/rumba/prototypes/rlite.py b/rumba/prototypes/rlite.py
index 5fa2c37..b175e92 100644
--- a/rumba/prototypes/rlite.py
+++ b/rumba/prototypes/rlite.py
@@ -23,7 +23,7 @@ import rumba.model as mod
 
 # An experiment over the RLITE implementation
 class Experiment(mod.Experiment):
-    def __init__(self, testbed, nodes = None):
+    def __init__(self, testbed, nodes=None):
         mod.Experiment.__init__(self, testbed, nodes)
 
     def setup(self):
@@ -31,8 +31,8 @@ class Experiment(mod.Experiment):
 
         cmds.append("sudo apt-get update")
         cmds.append("sudo apt-get install g++ gcc cmake "
-                          "linux-headers-$(uname -r) "
-                          "protobuf-compiler libprotobuf-dev git --yes")
+                    "linux-headers-$(uname -r) "
+                    "protobuf-compiler libprotobuf-dev git --yes")
         cmds.append("sudo rm -rf ~/rlite")
         cmds.append("cd ~; git clone https://github.com/vmaffione/rlite")
         cmds.append("cd ~/rlite && ./configure && make && sudo make install")
@@ -40,7 +40,7 @@ class Experiment(mod.Experiment):
 
         for node in self.nodes:
             ssh.execute_commands(self.testbed, node.full_name,
-                                 cmds, time_out = None)
+                                 cmds, time_out=None)
 
     def run(self):
         print("[RLITE experiment] start")
diff --git a/rumba/ssh_support.py b/rumba/ssh_support.py
index 552c43f..13ac1c6 100644
--- a/rumba/ssh_support.py
+++ b/rumba/ssh_support.py
@@ -27,7 +27,7 @@ def get_ssh_client():
 
     return ssh_client
 
-def execute_commands(testbed, hostname, commands, time_out = 3):
+def execute_commands(testbed, hostname, commands, time_out=3):
     '''
     Remote execution of a list of shell command on hostname. By
     default this function will exit (timeout) after 3 seconds.
@@ -44,9 +44,10 @@ def execute_commands(testbed, hostname, commands, time_out = 3):
     try:
         ssh_client.connect(hostname, 22,
                            testbed.username, testbed.password,
-                           look_for_keys = True, timeout = time_out)
+                           look_for_keys=True, timeout=time_out)
         for command in commands:
             stdin, stdout, stderr = ssh_client.exec_command(command)
+            del stdin, stdout
             err = str(stderr.read()).strip('b\'\"\\n')
             if err != "":
                 err_array = err.split('\\n')
@@ -58,7 +59,7 @@ def execute_commands(testbed, hostname, commands, time_out = 3):
         print(str(e))
         return
 
-def execute_command(testbed, hostname, command, time_out = 3):
+def execute_command(testbed, hostname, command, time_out=3):
     '''
     Remote execution of a list of shell command on hostname. By
     default this function will exit (timeout) after 3 seconds.
@@ -77,8 +78,9 @@ def execute_command(testbed, hostname, command, time_out = 3):
     try:
         ssh_client.connect(hostname, 22,
                            testbed.username, testbed.password,
-                           look_for_keys = True, timeout = time_out)
+                           look_for_keys=True, timeout=time_out)
         stdin, stdout, stderr = ssh_client.exec_command(command)
+        del stdin
         err = str(stderr.read()).strip('b\'\"\\n')
         if err != "":
             print(err)
@@ -113,6 +115,7 @@ def copy_file_to_testbed(testbed, hostname, text, file_name):
               "; chmod a+rwx " + file_name
 
         stdin, stdout, stderr = ssh_client.exec_command(cmd)
+        del stdin, stdout
         err = str(stderr.read()).strip('b\'\"\\n')
         if err != "":
             print(err)
@@ -126,31 +129,30 @@ def copy_file_to_testbed(testbed, hostname, text, file_name):
     except Exception as e:
         print(str(e))
 
-def setup_vlan(testbed, node_name, vlan_id, int_name):
+def setup_vlan(testbed, node, vlan_id, int_name):
     '''
     Gets the interface (ethx) to link mapping
 
     @param testbed: testbed info
-    @param node_name: the node to create the VLAN on
+    @param node: the node to create the VLAN on
     @param vlan_id: the VLAN id
     @param int_name: the name of the interface
     '''
-    print("Setting up VLAN on node " + node_name)
+    print("Setting up VLAN on node " + node.name)
 
-    node_full_name = full_name(node_name, testbed)
     cmd = "sudo ip link add link " + \
           str(int_name) + \
           " name " + str(int_name) + \
           "." + str(vlan_id) + \
           " type vlan id " + str(vlan_id)
-    execute_command(testbed, node_full_name, cmd)
+    execute_command(testbed, node.full_name, cmd)
     cmd = "sudo ifconfig " + \
           str(int_name) + "." + \
           str(vlan_id) + " up"
-    execute_command(node_full_name, cmd, testbed)
+    execute_command(node.full_name, cmd, testbed)
     cmd = "sudo ethtool -K " + \
           str(int_name) + " rxvlan off"
-    execute_command(node_full_name, cmd, testbed)
+    execute_command(node.full_name, cmd, testbed)
     cmd = "sudo ethtool -K " + \
           str(int_name) + " txvlan off"
-    execute_command(node_full_name, cmd, testbed)
+    execute_command(node.full_name, cmd, testbed)
diff --git a/rumba/testbeds/emulab.py b/rumba/testbeds/emulab.py
index 971202b..134d344 100644
--- a/rumba/testbeds/emulab.py
+++ b/rumba/testbeds/emulab.py
@@ -23,11 +23,11 @@ import os
 import time
 import re
 from ast import literal_eval
+import warnings
 
 import rumba.ssh_support as ssh
 import rumba.model as mod
 
-import warnings
 warnings.filterwarnings("ignore")
 
 # Represents an emulab testbed info
@@ -36,9 +36,9 @@ warnings.filterwarnings("ignore")
 # @image [string] specific image to use
 #
 class Testbed(mod.Testbed):
-    def __init__(self, exp_name, username, password = "",
-                 proj_name  = "ARCFIRE", url = "wall2.ilabt.iminds.be",
-                 image = "UBUNTU14-64-STD"):
+    def __init__(self, exp_name, username, password="",
+                 proj_name="ARCFIRE", url="wall2.ilabt.iminds.be",
+                 image="UBUNTU14-64-STD"):
         mod.Testbed.__init__(self, exp_name, username, password, proj_name)
         self.url = url
         self.image = image
@@ -66,7 +66,7 @@ class Testbed(mod.Testbed):
         return node_name + '.' + self.exp_name + '.' + \
             self.proj_name + '.' + self.url
 
-    def get_experiment_list(self, project_name = None):
+    def get_experiment_list(self, project_name=None):
         '''
         Get list of made emulab experiments accessible with your credentials
 
@@ -80,11 +80,11 @@ class Testbed(mod.Testbed):
 
         try:
             if project_name != None:
-                return  literal_eval(out)[project_name][project_name]
+                return literal_eval(out)[project_name][project_name]
             else:
-                return  literal_eval(out)
+                return literal_eval(out)
         except:
-            return { project_name: { project_name: [] }}
+            return {project_name: {project_name: []}}
 
     def swap_exp_in(self):
         '''
@@ -131,8 +131,8 @@ class Testbed(mod.Testbed):
               '" exp="' + exp_name + '" noswapin=true ' + \
               'nsfilepath="' + dest_file_name + '"'
 
-        ssh.execute_command(self, self.ops_server(), cmd, time_out = None)
-        ssh.execute_command(self, self.ops_server(),'rm ' + dest_file_name)
+        ssh.execute_command(self, self.ops_server(), cmd, time_out=None)
+        ssh.execute_command(self, self.ops_server(), 'rm ' + dest_file_name)
         print("New experiment succesfully created.")
 
     def generate_ns_script(self, experiment):
@@ -151,12 +151,12 @@ class Testbed(mod.Testbed):
         ns2_script += "source tb_compat.tcl\n"
 
         for node in experiment.nodes:
-                ns2_script += "set " + node.name + " [$ns node]\n"
-                ns2_script += "tb-set-node-os $" + node.name + " " + \
-                              self.image + "\n"
+            ns2_script += "set " + node.name + " [$ns node]\n"
+            ns2_script += "tb-set-node-os $" + node.name + " " + \
+                          self.image + "\n"
 
         for dif in experiment.dif_ordering:
-            if type(dif) is mod.ShimEthDIF:
+            if isinstance(dif, mod.ShimEthDIF):
                 if len(dif.ipcps) != 2:
                     continue
                 ns2_script += "set " + dif.name + \
@@ -220,17 +220,17 @@ class Testbed(mod.Testbed):
                         continue
                     for ipcp in node.ipcps:
                         if ipcp.dif.name == link_name:
-                                self.ip[ipcp] = link_ip
+                            self.ip[ipcp] = link_ip
 
         for node in experiment.nodes:
             cmd = 'cat /var/emulab/boot/ifmap'
-            node_full_name  = self.full_name(node.name)
+            node_full_name = self.full_name(node.name)
             output = ssh.execute_command(self, node_full_name, cmd)
             output = re.split('\\\\n', output)
             for item in output:
                 item = item.split()
                 for ipcp in node.ipcps:
-                    if type(ipcp) is mod.ShimEthIPCP:
+                    if isinstance(ipcp, mod.ShimEthIPCP):
                         if self.ip[ipcp] == item[1]:
                             ipcp.ifname = item[0]
             node.full_name = self.full_name(node.name)
diff --git a/rumba/testbeds/faketestbed.py b/rumba/testbeds/faketestbed.py
index 8d5e724..4821aa8 100644
--- a/rumba/testbeds/faketestbed.py
+++ b/rumba/testbeds/faketestbed.py
@@ -22,8 +22,7 @@ import rumba.model as mod
 
 # Fake testbed, useful for testing
 class Testbed(mod.Testbed):
-    def __init__(self, exp_name, username, proj_name = "ARCFIRE",
-                 password = ""):
+    def __init__(self, exp_name, username, proj_name="ARCFIRE", password=""):
         mod.Testbed.__init__(self, exp_name, username, password, proj_name)
 
     def create_experiment(self, experiment):
diff --git a/rumba/testbeds/jfed.py b/rumba/testbeds/jfed.py
index 4a36d4a..e606846 100644
--- a/rumba/testbeds/jfed.py
+++ b/rumba/testbeds/jfed.py
@@ -25,9 +25,9 @@ import xml.dom.minidom as xml
 import rumba.model as mod
 
 class Testbed(mod.Testbed):
-    def __init__(self, exp_name, username, cert_file, jfed_jar, exp_hours = "2",
-                 proj_name = "ARCFIRE", authority = "wall2.ilabt.iminds.be"):
-        passwd = getpass.getpass(prompt = "Password for certificate file: ")
+    def __init__(self, exp_name, username, cert_file, jfed_jar, exp_hours="2",
+                 proj_name="ARCFIRE", authority="wall2.ilabt.iminds.be"):
+        passwd = getpass.getpass(prompt="Password for certificate file: ")
         mod.Testbed.__init__(self, exp_name, username, passwd, proj_name)
         self.authority = "urn:publicid:IDN+" + authority + "+authority+cm"
         self.auth_name = authority
@@ -35,10 +35,10 @@ class Testbed(mod.Testbed):
         self.jfed_jar = jfed_jar
         self.exp_hours = exp_hours
         self.if_id = dict()
-
-    def create_rspec(self, experiment):
         self.rspec = self.exp_name + ".rspec"
+        self.manifest = self.exp_name + ".rrspec"
 
+    def create_rspec(self, experiment):
         impl = xml.getDOMImplementation()
         doc = impl.createDocument(None, "rspec", None)
 
@@ -80,7 +80,7 @@ class Testbed(mod.Testbed):
 
             node.ifs = 0
             for ipcp in node.ipcps:
-                if type(ipcp) is mod.ShimEthIPCP:
+                if isinstance(ipcp, mod.ShimEthIPCP):
                     el3 = doc.createElement("interface")
                     self.if_id[ipcp] = node.name + ":if" + str(node.ifs)
                     el3.setAttribute("client_id", self.if_id[ipcp])
@@ -88,7 +88,7 @@ class Testbed(mod.Testbed):
                     el.appendChild(el3)
 
         for dif in experiment.dif_ordering:
-            if type(dif) is mod.ShimEthDIF:
+            if isinstance(dif, mod.ShimEthDIF):
                 el = doc.createElement("link")
                 top_el.appendChild(el)
                 el.setAttribute("client_id", dif.name)
@@ -108,7 +108,6 @@ class Testbed(mod.Testbed):
 
     def create_experiment(self, experiment):
         self.create_rspec(experiment)
-        self.manifest = self.exp_name + ".rrspec"
 
         for node in experiment.nodes:
             auth_name_r = self.auth_name.replace(".", "-")
@@ -140,7 +139,7 @@ class Testbed(mod.Testbed):
             for intf in intfs:
                 i_name = intf.getAttribute("client_id")
                 for ipcp in node_n.ipcps:
-                    if type(ipcp) is mod.ShimEthIPCP:
+                    if isinstance(ipcp, mod.ShimEthIPCP):
                         if self.if_id[ipcp] == i_name:
                             comp_id = intf.getAttribute("component_id")
                             comp_arr = comp_id.split(":")
diff --git a/rumba/testbeds/qemu.py b/rumba/testbeds/qemu.py
index 3f4cb4a..158f360 100644
--- a/rumba/testbeds/qemu.py
+++ b/rumba/testbeds/qemu.py
@@ -22,8 +22,7 @@ import rumba.model as mod
 
 # Fake testbed, useful for testing
 class Testbed(mod.Testbed):
-    def __init__(self, exp_name, username, proj_name = "ARCFIRE",
-                 password = ""):
+    def __init__(self, exp_name, username, proj_name="ARCFIRE", password=""):
         mod.Testbed.__init__(self, exp_name, username, password, proj_name)
 
     def create_experiment(self, experiment):