--- a/sat/plugins/plugin_misc_file.py	Wed Jul 31 11:31:22 2019 +0200
+++ b/sat/plugins/plugin_misc_file.py	Tue Aug 13 19:08:41 2019 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 # SAT plugin for file tansfer
@@ -45,14 +45,14 @@
 }
 
 
-SENDING = D_(u"Please select a file to send to {peer}")
-SENDING_TITLE = D_(u"File sending")
+SENDING = D_("Please select a file to send to {peer}")
+SENDING_TITLE = D_("File sending")
 CONFIRM = D_(
-    u'{peer} wants to send the file "{name}" to you:\n{desc}\n\nThe file has a size of {size_human}\n\nDo you accept ?'
+    '{peer} wants to send the file "{name}" to you:\n{desc}\n\nThe file has a size of {size_human}\n\nDo you accept ?'
 )
-CONFIRM_TITLE = D_(u"Confirm file transfer")
-CONFIRM_OVERWRITE = D_(u"File {} already exists, are you sure you want to overwrite ?")
-CONFIRM_OVERWRITE_TITLE = D_(u"File exists")
+CONFIRM_TITLE = D_("Confirm file transfer")
+CONFIRM_OVERWRITE = D_("File {} already exists, are you sure you want to overwrite ?")
+CONFIRM_OVERWRITE_TITLE = D_("File exists")
 SECURITY_LIMIT = 30
 
 PROGRESS_ID_KEY = "progress_id"
@@ -70,7 +70,7 @@
             in_sign="ssssa{ss}s",
             out_sign="a{ss}",
             method=self._fileSend,
-            async=True,
+            async_=True,
         )
         self._file_callbacks = []
         host.importMenu(
@@ -109,14 +109,14 @@
         @return (dict): action dictionary, with progress id in case of success, else xmlui message
         """
         if not os.path.isfile(filepath):
-            raise exceptions.DataError(u"The given path doesn't link to a file")
+            raise exceptions.DataError("The given path doesn't link to a file")
         if not filename:
             filename = os.path.basename(filepath) or "_"
         for namespace, callback, priority, method_name in self._file_callbacks:
             has_feature = yield self.host.hasFeature(client, namespace, peer_jid)
             if has_feature:
                 log.info(
-                    u"{name} method will be used to send the file".format(
+                    "{name} method will be used to send the file".format(
                         name=method_name
                     )
                 )
@@ -124,12 +124,12 @@
                     client, peer_jid, filepath, filename, file_desc, extra
                 )
                 defer.returnValue({"progress": progress_id})
-        msg = u"Can't find any method to send file to {jid}".format(jid=peer_jid.full())
+        msg = "Can't find any method to send file to {jid}".format(jid=peer_jid.full())
         log.warning(msg)
         defer.returnValue(
             {
                 "xmlui": xml_tools.note(
-                    u"Can't transfer file", msg, C.XMLUI_DATA_LVL_WARNING
+                    "Can't transfer file", msg, C.XMLUI_DATA_LVL_WARNING
                 ).toXml()
             }
         )
@@ -181,7 +181,7 @@
         for data in self._file_callbacks:
             if namespace == data[0]:
                 raise exceptions.ConflictError(
-                    u"A method with this namespace is already registered"
+                    "A method with this namespace is already registered"
                 )
         self._file_callbacks.append(
             (namespace, callback, priority, method_name or namespace)
@@ -193,7 +193,7 @@
             if data[0] == namespace:
                 del [idx]
                 return
-        raise exceptions.NotFound(u"The namespace to unregister doesn't exist")
+        raise exceptions.NotFound("The namespace to unregister doesn't exist")
 
     # Dialogs with user
     # the overwrite check is done here
@@ -241,7 +241,7 @@
             return False
         path = data["path"]
         file_data["file_path"] = file_path = os.path.join(path, file_data["name"])
-        log.debug(u"destination file path set to {}".format(file_path))
+        log.debug("destination file path set to {}".format(file_path))
 
         # we manage case where file already exists
         if os.path.exists(file_path):
@@ -309,7 +309,7 @@
         assert filename and not "/" in filename
         assert PROGRESS_ID_KEY in file_data
         # human readable size
-        file_data["size_human"] = u"{:.6n} Mio".format(
+        file_data["size_human"] = "{:.6n} Mio".format(
             float(file_data["size"]) / (1024 ** 2)
         )
         d = xml_tools.deferDialog(