commit 31491ce82aa7f1f5b9485e5ac61cce1d8569717f
Author: vaydheesh <lokendras1998@gmail.com>
Date:   Tue Jun 11 13:57:42 2019 +0000

    Added TypeAnnotation and flake8 ignore apertium/swig

diff --git a/.flake8 b/.flake8
index 331cb8d..0fe567f 100644
--- a/.flake8
+++ b/.flake8
@@ -1,2 +1,3 @@
 [flake8]
 max-line-length=160
+exclude=apertium/swig/
diff --git a/apertium/lttoolbox.py b/apertium/lttoolbox.py
index 8154a6b..9a61f65 100644
--- a/apertium/lttoolbox.py
+++ b/apertium/lttoolbox.py
@@ -1,6 +1,6 @@
 import platform
 import tempfile
-
+from typing import ByteString
 if platform.system() == 'Linux':
     from apertium.swig.linux import lttoolbox
 elif platform.system() == 'Windows':
@@ -16,7 +16,7 @@ class LtProc:
         output_text (str)
     """
 
-    def __init__(self, input_text, arg_index, path):
+    def __init__(self, input_text, arg_index, path):  # type: (LtProc, str, int, str) -> None
         """
         Args:
             input_text (str)
@@ -46,7 +46,7 @@ class LtProc:
             fst.analyze(self.path, input_file.name, output_file.name)
             self.output_text = output_file.read()
 
-    def execute(self):
+    def execute(self):  # type: (LtProc) -> ByteString
         """
         Executes the required method, depending upon the argument for lt-proc
 
@@ -54,7 +54,7 @@ class LtProc:
             self (LtProc)
 
         Returns:
-            (bytes)
+            (ByteString)
         """
         if self.arg_index == '-w':
             self.analyze()