Refactor version handling

setup.py

@@ -4,16 +4,20 @@
 from setuptools import setup, find_packages
 
 
-fname = os.path.join('.', 'sklearn_porter', '__version__.txt')
-version = open(fname).readlines().pop()
+path = os.path.abspath(os.path.dirname(__file__))
+
+# Version:
+version_path = str(os.path.join(path, 'sklearn_porter', '__version__.txt'))
+version = open(version_path).readlines().pop()
 if isinstance(version, bytes):
     version = version.decode('utf-8')
 version = str(version).strip()
 
-path = os.path.abspath(os.path.dirname(__file__))
-with open(os.path.join(path, 'requirements.txt')) as f:
+# Requirements:
+requirements_path = os.path.join(path, 'requirements.txt')
+with open(requirements_path) as f:
     all_reqs = f.read().split('\n')
-install_requires = [x.strip() for x in all_reqs if 'git+' not in x]
+requirements = [x.strip() for x in all_reqs if 'git+' not in x]
 
 setup(
     name='sklearn-porter',
@@ -34,7 +38,7 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
     ],
-    install_requires=install_requires,
+    install_requires=requirements,
     keywords=['sklearn', 'scikit-learn'],
     license='MIT',
 )

sklearn_porter/Porter.py

@@ -22,7 +22,14 @@
 
 
 class Porter:
-    __version__ = '0.4.0'
+
+    # Version:
+    _version_path = str(os.path.join(os.path.dirname(__file__),
+                                     '__version__.txt'))
+    _version = open(_version_path).readlines().pop()
+    if isinstance(_version, bytes):
+        _version = _version.decode('utf-8')
+    __version__ = str(_version).strip()
 
     def __init__(self, model, language='java', method='predict', **kwargs):
         """