python - 属性错误 : 'XPathExpr' object has no attribute 'add_post_condition'

Question

我正在尝试安装 pyquery在 Windows 上，当我尝试像这样选择 d('p:first') 时出现以下错误。其他一切似乎都在工作。知道我错过了什么吗？这个问题只发生在我的 Windows 机器上，在我的 MAC 上工作正常。

Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyquery import PyQuery as pq
>>> d = pq("<p></p>")
>>> d('p:first')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\pyquery-1.2.4-py2.7.egg\pyquery\pyquery.py
", line 237, in __call__
    result = self.__class__(*args, parent=self, **kwargs)
  File "C:\Python27\lib\site-packages\pyquery-1.2.4-py2.7.egg\pyquery\pyquery.py
", line 213, in __init__
    xpath = self._css_to_xpath(selector)
  File "C:\Python27\lib\site-packages\pyquery-1.2.4-py2.7.egg\pyquery\pyquery.py
", line 223, in _css_to_xpath
    return self._translator.css_to_xpath(selector, prefix)
  File "build\bdist.win32\egg\cssselect\xpath.py", line 188, in css_to_xpath
  File "build\bdist.win32\egg\cssselect\xpath.py", line 188, in <genexpr>
  File "build\bdist.win32\egg\cssselect\xpath.py", line 208, in selector_to_xpat
h
  File "build\bdist.win32\egg\cssselect\xpath.py", line 230, in xpath
  File "build\bdist.win32\egg\cssselect\xpath.py", line 272, in xpath_pseudo
  File "C:\Python27\lib\site-packages\pyquery-1.2.4-py2.7.egg\pyquery\cssselectp
atch.py", line 19, in xpath_first_pseudo
    xpath.add_post_condition('position() = 1')
AttributeError: 'XPathExpr' object has no attribute 'add_post_condition'
>>>

Answer 1

我用“easy_install pyquery”安装了 pyquery，这导致了这个错误。 我删除了它，然后从 https://github.com/gawel/pyquery 安装了它使用 python setup.py install 现在可以正常工作了。