Replace pip internal functions

setup.py

@@ -22,6 +22,7 @@
     'requests',
     'semantic_version',
     'pyopenssl',
+    'packaging',
 ]
 
 # Setup configuration
@@ -93,13 +94,12 @@ def run(self):
         # Full list: https://pypi.python.org/pypi?%3Aaction=list_classifiers
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Intended Audience :: Developers',

updatable/__init__.py

@@ -1,16 +1,13 @@
 # -*- coding: utf-8 -*-
+import sys
 import re
 import argparse
 import requests
 import semantic_version
 
 from datetime import datetime
-from pip.operations import freeze
-
-try:
-    from packaging.version import parse
-except ImportError:
-    from pip._vendor.packaging.version import parse
+from subprocess import check_output
+from packaging.version import parse
 
 
 def get_parsed_environment_package_list():
@@ -31,10 +28,10 @@ def get_environment_requirements_list():
     :return: string
     """
     requirement_list = []
-    requirements = freeze.freeze()
+    requirements = check_output([sys.executable, '-m', 'pip', 'freeze'])
 
-    for requirement in requirements:
-        requirement_list.append(requirement)
+    for requirement in requirements.split():
+        requirement_list.append(requirement.decode("utf-8"))
 
     return requirement_list
 

updatable/__version__.py

@@ -1,3 +1,2 @@
 # -*- coding: utf-8 -*-
-
-__version__ = "0.2.0"
+__version__ = "0.3.0"