Optimized requirements reading process

setup.py

@@ -1,4 +1,5 @@
 # Always prefer setuptools over distutils
+from pip._internal.req import parse_requirements
 from setuptools import setup, find_packages
 # To use a consistent encoding
 from codecs import open
@@ -11,13 +12,8 @@
 with open(path.join(here, 'README.md'), encoding='utf-8') as f:
     long_description = f.read()
 
-with open('requirements.txt', encoding='utf-8') as f:
-    install_requires = map(lambda line: line.strip(), f.readlines())
-    install_requires = filter(lambda line: bool(line), install_requires)
-
-with open('test-requirements.txt', encoding='utf-8') as f:
-    test_requires = map(lambda line: line.strip(), f.readlines())
-    test_requires = filter(lambda line: bool(line), install_requires)
+install_requires = [req.req for req in parse_requirements('requirements.txt')]
+test_requires = [req.req for req in parse_requirements('test-requirements.txt')]
 
 setup(
     name='freenom dns updater',
@@ -80,15 +76,15 @@
     # your project is installed. For an analysis of "install_requires" vs pip's
     # requirements files see:
     # https://packaging.python.org/en/latest/requirements.html
-    install_requires=list(install_requires),
+    install_requires=install_requires,
 
     # List additional groups of dependencies here (e.g. development
     # dependencies). You can install these using the following syntax,
     # for example:
     # $ pip install -e .[dev,test]
     extras_require={
         'dev': ['check-manifest'],
-        'test': list(test_requires),
+        'test': test_requires,
     },
 
     # If there are data files included in your packages that need to be