window10 安装python xgboost出现WindowsError: [Error 126]

windows10之上python安装xgboost采用如下步骤（https://stackoverflow.com/questions/33749735/how-to-install-xgboost-package-in-python-windows-platform）：

download xgboost whl file from here (make
sure to match your python version and system architecture, e.g. "xgboost-0.6-cp35-cp35m-win_amd64.whl" for python 3.5 on 64-bit machine)

open command prompt

cd

to
your Downloads folder (or wherever you saved the whl file)

pip
install xgboost-0.6-cp35-cp35m-win_amd64.whl

(or whatever your whl file is named)

安装成功之后，import xgboost时，报如下错误信息：

import xgboost as xgb

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "xgboost\__init__.py", line 11, in <module>

from .core import DMatrix, Booster

File "xgboost\core.py", line 115, in <module>

_LIB = _load_lib()

File "xgboost\core.py", line 109, in _load_lib

lib = ctypes.cdll.LoadLibrary(lib_path[0])

File "C:\Python27\lib\ctypes\__init__.py", line 444, in LoadLibrary

return self._dlltype(name)

File "C:\Python27\lib\ctypes\__init__.py", line 366, in __init__

self._handle = _dlopen(self._name, mode)

WindowsError: [Error 126]

造成该问题的原因为：电脑缺少VC++相关运行库。

解决方法：下载VC++运行库，64位版本下载地址为 https://www.microsoft.com/zh-cn/download/confirmation.aspx?id=48145