commit adf9d96ae84caa8ac19665e4517fada2d1690f1c
Author: vaydheesh <lokendras1998@gmail.com>
Date:   Mon Jul 22 18:21:19 2019 +0530

    mock streamparser
    
    import apertium in setup.py,
    causes import error, if apertium-streamparser isnt available during installation

diff --git a/apertium/installer.py b/apertium/installer.py
index 9c4a435..1702bd8 100644
--- a/apertium/installer.py
+++ b/apertium/installer.py
@@ -115,7 +115,7 @@ class Ubuntu:
         execute.check_returncode()
 
     @staticmethod
-    def _rename_wrappers():
+    def _rename_wrappers() -> None:
         wrapper_name = {
             'python3-apertium': '_apertium_core',
             'python3-apertium-lex-tools': '_lextools',
diff --git a/setup.py b/setup.py
index 2b800ad..3c9395f 100644
--- a/setup.py
+++ b/setup.py
@@ -2,6 +2,8 @@ from atexit import register
 from os import path
 from setuptools import find_packages, setup  # noqa: I202
 from setuptools.command.install import install
+import sys
+from unittest.mock import Mock
 
 
 class PostInstallCommand(install):
@@ -11,6 +13,9 @@ class PostInstallCommand(install):
 
     @staticmethod
     def _post_install():
+        # mock apertium-streamparser for importing apertium
+        sys.modules['streamparser'] = Mock()
+
         import apertium
         apertium.installer.install_apertium()
         apertium.installer.install_module('eng')