Windows上的VPython安装错误

Question

>>> import visual
RuntimeError: module compiled against API version 9 but this version of numpy is 7

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import visual
  File "C:\Python27\lib\site-packages\visual\__init__.py", line 3, in <module>
    from visual.visual_all import * # this statement not included in vis/__init__.py
  File "C:\Python27\lib\site-packages\visual\visual_all.py", line 10, in <module>
    from visual_common.cvisual import vector
ImportError: numpy.core.multiarray failed to import

当我试图在2.7.9上导入视觉错误时，我收到此错误？