python引入pytesseract报错：ValueError

想写一个简单的图片识别功能的小程序，安装好pillow和pytesseract两个包后，执行简单的测试程序

from PIL import Image
import pytesseract
image = Image.open('Code.png')
vcode = pytesseract.image_to_string(image)
print vcode

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\pytesseract\__init__.py", line 1, in <modu
le>
    from .pytesseract import (
  File "C:\Python27\lib\site-packages\pytesseract\pytesseract.py", line 9, in <m
odule>
    import Image
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 27, in <module>
    from . import VERSION, PILLOW_VERSION, _plugins
ValueError: Attempted relative import in non-package

解决办法：
打开C:\Python27\Lib\site-packages\pytesseract\pytesseract.py文件，将

try:
    import Image
except ImportError:
    from PIL import Image

改成：

try:
    from PIL import Image
except ImportError:
    from PIL import Image

问题解决。