diff --git a/plugins/libvirt/kvm_net b/plugins/libvirt/kvm_net
index c9f1d93d..6bf14553 100755
--- a/plugins/libvirt/kvm_net
+++ b/plugins/libvirt/kvm_net
@@ -19,9 +19,10 @@ import re, os, sys
 from subprocess import Popen, PIPE
 
 def config(vm_names):
-    ''' Print the plugin's config
+    """ Print the plugin's config
+
     @param vm_names : a list of "cleaned" vms' name
-    '''
+    """
     base_config = """graph_title KVM Network I/O
 graph_vlabel Bytes rx(-)/tx(+) per second
 graph_category Virtualization
@@ -41,21 +42,23 @@ graph_args --base 1024
         print "%s_out.draw LINE2" % vm
 
 def clean_vm_name(vm_name):
-    ''' Replace all special chars
+    """ Replace all special chars
+
     @param vm_name : a vm's name
     @return cleaned vm's name
-    '''
+    """
     # suffix part defined in conf
-    suffix = os.getenv('vmsuffix')
+    suffix = os.getenv("vmsuffix")
     if suffix:
-        vm_name = re.sub(suffix,'',vm_name)
+        vm_name = re.sub(suffix, "", vm_name)
 
     return re.sub(r"[^a-zA-Z0-9_]", "_", vm_name)
     
 def fetch(vms):
-    ''' Fetch values for a list of pids
+    """ Fetch values for a list of pids
+
     @param dictionnary {kvm_pid: cleaned vm name}
-    '''
+    """
     res = {}
     for pid in vms:
         tap = get_vm_mac(pid)
@@ -71,16 +74,16 @@ def fetch(vms):
             continue
 
 def detect_kvm():
-    ''' Check if kvm is installed
-    '''
+    """ Check if kvm is installed """
     kvm = Popen("which kvm", shell=True, stdout=PIPE)
     kvm.communicate()
     return not bool(kvm.returncode)
 
 def find_vm_names(pids):
-    '''Find and clean vm names from pids
+    """Find and clean vm names from pids
+
     @return a dictionnary of {pids : cleaned vm name}
-    '''
+    """
     result = {}
     for pid in pids:
         cmdline = open("/proc/%s/cmdline" % pid, "r")
@@ -88,25 +91,27 @@ def find_vm_names(pids):
     return result
     
 def get_vm_mac(pid):
-    '''Find and clean vm names from pids
+    """Find and clean vm names from pids
+
     @return the mac address for a specified pid
-    '''
+    """
     cmdline = open("/proc/%s/cmdline" % pid, "r")
     line = cmdline.readline()
     mac = re.sub(r"^.*ifname=(tap[^,]+),.*$",r"\1", line)
     return mac
 
 def list_pids():
-    ''' Find the pid of kvm processes
+    """ Find the pid of kvm processes
+
     @return a list of pids from running kvm
-    '''
+    """
     pid = Popen("pidof qemu-kvm qemu-system-x86_64 kvm", shell=True, stdout=PIPE)
     return pid.communicate()[0].split()
 
 
 if __name__ == "__main__":
     if len(sys.argv) > 1:
-        if sys.argv[1] in ['autoconf', 'detect']:
+        if sys.argv[1] in ["autoconf", "detect"]:
             if detect_kvm():
                 print "yes"
             else: