diff --git a/mylib/sftp.py b/mylib/sftp.py
index 0a2d9ec..b323de5 100644
--- a/mylib/sftp.py
+++ b/mylib/sftp.py
@@ -102,10 +102,12 @@ class SFTPClient(ConfigurableObject):
             self.initial_directory = ""
 
     def get_file(self, remote_filepath, local_filepath):
+        """ Retrieve a file from SFTP server """
         log.debug("Retreive file '%s' to '%s'", remote_filepath, local_filepath)
         return self.sftp_client.get(remote_filepath, local_filepath) is None
 
     def open_file(self, remote_filepath, mode='r'):
+        """ Remotly open a file on SFTP server """
         log.debug("Remotly open file '%s'", remote_filepath)
         return self.sftp_client.open(remote_filepath, mode=mode)