separate setup.py with pip installation, add trouble shooting page

python-package/setup_pip.py

@@ -0,0 +1,58 @@
+# pylint: disable=invalid-name, exec-used
+"""Setup xgboost package."""
+from __future__ import absolute_import
+import sys
+import os
+from setuptools import setup, find_packages
+#import subprocess
+sys.path.insert(0, '.')
+
+#this script is for packing and shipping pip installation
+#it builds xgboost code on the fly and packs for pip
+#please don't use this file for installing from github
+
+if not os.name == 'nt': #if not windows, compile and install
+    os.system('sh ./xgboost/build-python.sh')
+else:
+    print('Windows users please use github installation.')
+    sys.exit()
+
+CURRENT_DIR = os.path.dirname(__file__)
+
+# We can not import `xgboost.libpath` in setup.py directly since xgboost/__init__.py
+# import `xgboost.core` and finally will import `numpy` and `scipy` which are setup
+# `install_requires`. That's why we're using `exec` here.
+libpath_py = os.path.join(CURRENT_DIR, 'xgboost/libpath.py')
+libpath = {'__file__': libpath_py}
+exec(compile(open(libpath_py, "rb").read(), libpath_py, 'exec'), libpath, libpath)
+
+LIB_PATH = libpath['find_lib_path']()
+
+#to deploy to pip, please use
+#make pythonpack
+#python setup.py register sdist upload
+#and be sure to test it firstly using "python setup.py register sdist upload -r pypitest"
+setup(name='xgboost',
+      #version=open(os.path.join(CURRENT_DIR, 'xgboost/VERSION')).read().strip(),
+      version='0.4a24',
+      description=open(os.path.join(CURRENT_DIR, 'README.md')).read(),
+      install_requires=[
+          'numpy',
+          'scipy',
+      ],
+      maintainer='Hongliang Liu',
+      maintainer_email='phunter.lau@gmail.com',
+      zip_safe=False,
+      packages=find_packages(),
+      #don't need this and don't use this, give everything to MANIFEST.in
+      #package_dir = {'':'xgboost'},
+      #package_data = {'': ['*.txt','*.md','*.sh'],
+      #               }
+      #this will use MANIFEST.in during install where we specify additional files,
+      #this is the golden line
+      include_package_data=True,
+      #!!! don't use data_files for creating pip installation,
+      #otherwise install_data process will copy it to
+      #root directory for some machines, and cause confusions on building
+      #data_files=[('xgboost', LIB_PATH)],
+      url='https://github.com/dmlc/xgboost')