python Python下的XQuery库
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XQuery library under Python
提问by Ooki
Is there any existing way to run XQuery under python? (not starting to build a parser yourself in other words).
是否有任何现有的方法可以在 python 下运行 XQuery？（换句话说，不是自己开始构建解析器）。
I got a ton of legacy XQuery that I want to port to our new system, or rather I want to port the framework and not XQuery.
我有大量的遗留 XQuery，我想将它们移植到我们的新系统，或者更确切地说，我想移植框架而不是 XQuery。
Therefore: Is there any library that allows me to run XQuery under python?
因此：是否有任何库可以让我在 python 下运行 XQuery？
采纳答案by Aiden Bell
Sort of ...
有点 ...
Looking through the W3C implementations list for XQuerythere is:
- Python bindings for Zorba
- Sednais a free native XML database with API for Python.
- Zorba 的 Python 绑定
- Sedna是一个免费的原生 XML 数据库，带有Python 的API 。
A few Python examples with Zorba, from here
Zorba 的一些 Python 示例，来自这里
import sys
import zorba_api
def example1(zorba):
xquery = zorba.compileQuery("1+2")
print xquery.printPlanAsXML()
print xquery.execute()
return
def example2(zorba):
xquery = zorba.compileQuery("(1,2,3,4,5)")
iter = xquery.iterator()
iter.open()
item = zorba_api.Item_createEmptyItem()
while iter.next(item):
print item.getStringValue()
iter.close()
iter.destroy()
return
def example3(zorba):
try:
xquery = zorba.compileQuery("1 div 0")
print xquery.execute()
except RuntimeError, e:
print e
return
There may be C implementation in that list which can easily be bound to Python. Hope this helps, I was somewhat surprised to see so few implementations. Although, XQuery isn't the most desired of the XML tools I suppose.
该列表中可能有 C 实现，可以很容易地绑定到 Python。希望这会有所帮助，看到如此少的实现让我有些惊讶。虽然，XQuery 并不是我认为最需要的 XML 工具。
回答by kohsah
回答by vadim
Zorba 1.2 works from python. After installation you will get a python folder under zorba folder. Append it to sys.path, with zorba\bin folder also. After all manipulations import "zorba_api" will work!
Zorba 1.2 从 python 工作。安装后你会在 zorba 文件夹下得到一个 python 文件夹。将其附加到 sys.path，还有 zorba\bin 文件夹。在所有操作导入“zorba_api”之后就可以了！
回答by Jan Vlcinsky
I had problems like Ted and tried to use answer from vadim. However, I had still problems to load zorba_api properly, complaining "ImportError DLL load failed" (not telling which one, using %1 as great nickname).
我遇到了像 Ted 这样的问题，并尝试使用来自 vadim 的答案。但是，我仍然无法正确加载 zorba_api，抱怨“ImportError DLL 加载失败”（不知道是哪一个，使用 %1 作为很好的昵称）。
Finally, I got the solution:
最后，我得到了解决方案：
Environment
环境
- WindowsXP
- Python 2.6 installed at c:\Python26
- 视窗XP
- Python 2.6 安装在 c:\Python26
Installation
安装
- Zorba 1.2 or 1.4 installed to standard location
- Path to Zorba bin as first item in
PATH - both files from Zorba bin\python (
zorba_api.pyand_zorba_api.pyd) moved toC:\Python26\LIB\site-packages
- Zorba 1.2 或 1.4 安装到标准位置
- Zorba bin 作为第一个项目的路径
PATH - Zorba bin\python (
zorba_api.py和_zorba_api.pyd) 中的两个文件都移至C:\Python26\LIB\site-packages
As result, I was able to run C:\Program Files\Zorba XQuery Processor 1.4.0\share\doc\zorba-1.4.0\python\examples\python_test.pyfrom any folder in my computer, even without the python line, modifying PATH
结果，C:\Program Files\Zorba XQuery Processor 1.4.0\share\doc\zorba-1.4.0\python\examples\python_test.py即使没有 python 行，我也可以从计算机中的任何文件夹运行，修改 PATH
NB:
注意：
- PATH problem might be related to too long string there.
- Process Monitorwas of good help finding, which DLL cannot be loaded
- PATH 问题可能与那里的字符串太长有关。
- Process Monitor可以很好地帮助查找无法加载哪个 DLL
