File fix_pip_version.patch of Package python-sievelib

--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,10 @@ from __future__ import unicode_literals
 
 import io
 from os import path
-from pip.req import parse_requirements
+try:  # for pip >= 10
+    from pip._internal.req import parse_requirements
+except ImportError:
+    from pip.req import parse_requirements
 from setuptools import setup, find_packages