Clean up the python in App/launch a bit

App/launch

@@ -26,13 +26,13 @@ def launch(node, manifest, config, cmd, log_folder, epoch_time, num_epochs, num_
         cmdline = manifestdata['launchprefix'] + ' '
     cmdline += TEEMS + " -k %s -n %s" % (manifestdata['sprvfile'], node)
 
-    if(epoch_time):
+    if epoch_time:
         cmdline+= ' -d ' + str(epoch_time)
 
-    if(num_epochs):
+    if num_epochs:
         cmdline+= ' -e ' + str(num_epochs)
 
-    if(num_WN):
+    if num_WN:
         cmdline+= ' -w ' + str(num_WN)
 
     if 'args' in manifestdata:
@@ -40,7 +40,7 @@ def launch(node, manifest, config, cmd, log_folder, epoch_time, num_epochs, num_
 
     log_name = None
     stdout_file = subprocess.PIPE
-    if(log_folder):
+    if log_folder:
         log_name = log_folder + node + ".log"
         stdout_file = open(log_name, "a+")
 
@@ -50,7 +50,7 @@ def launch(node, manifest, config, cmd, log_folder, epoch_time, num_epochs, num_
         stderr=subprocess.STDOUT, bufsize=0)
     proc.stdin.write(config.encode('utf-8'))
 
-    if(log_folder == None):
+    if log_folder is None:
         while True:
             line = proc.stdout.readline()
             if not line:
@@ -83,7 +83,7 @@ if __name__ == "__main__":
     aparse.add_argument('-l', default=None,
         help='log folder to store logs of each server in an experiment')
     aparse.add_argument('-d', default=None,
-        help='Set epoch interval time in seconds')
+        help='Set epoch wait time in seconds')
     aparse.add_argument('-e', default=None,
         help='Set number of epochs')
     aparse.add_argument('-w', default=None,