Merge pull request apache#2 from apache/python-sdk

Syncing from original

sdks/python/README.md

@@ -118,7 +118,7 @@ set up your machine's Python development environment.
 #### Install ``pip``
 
 `pip` is Python's package manager.  If you already have `pip` installed
-(type `pip -V` to check), skip this step.
+(type `pip -V` to check), please make sure to have at least version 7.0.0.
 
 There are several ways to install `pip`; use whichever works for you.
 

sdks/python/setup.py

@@ -17,10 +17,16 @@
 
 """Apache Beam SDK for Python setup file."""
 
+from distutils.version import StrictVersion
+
 import os
 import platform
+import warnings
+
 import setuptools
 
+from pkg_resources import get_distribution, DistributionNotFound
+
 
 def get_version():
   global_names = {}
@@ -40,6 +46,30 @@ def get_version():
 TBD
 '''
 
+REQUIRED_PIP_VERSION = '7.0.0'
+_PIP_VERSION = get_distribution('pip').version
+if StrictVersion(_PIP_VERSION) < StrictVersion(REQUIRED_PIP_VERSION):
+  warnings.warn(
+      "You are using version {0} of pip. " \
+      "However, version {1} is recommended.".format(
+          _PIP_VERSION, REQUIRED_PIP_VERSION
+      )
+  )
+
+
+REQUIRED_CYTHON_VERSION = '0.23.2'
+try:
+  _CYTHON_VERSION = get_distribution('cython').version
+  if StrictVersion(_CYTHON_VERSION) < StrictVersion(REQUIRED_CYTHON_VERSION):
+    warnings.warn(
+        "You are using version {0} of cython. " \
+        "However, version {1} is recommended.".format(
+            _CYTHON_VERSION, REQUIRED_CYTHON_VERSION
+        )
+    )
+except DistributionNotFound:
+  # do nothing if Cython is not installed
+  pass
 
 # Currently all compiled modules are optional  (for performance only).
 if platform.system() == 'Windows':
@@ -59,7 +89,7 @@ def get_version():
     'google-apitools>=0.5.2',
     'httplib2>=0.8',
     'mock>=1.0.1',
-    'oauth2client>=2.0.1',
+    'oauth2client>=2.0.1,<4.0.0',
     'protorpc>=0.9.1',
     'python-gflags>=2.0',
     'pyyaml>=3.10',