saxonc 的 transform_to_file()，在循环中执行，不转换但给出无意义的错误或部分输出

Question

我的转换样式表文件包含：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
    <xsl:template match="/">
        <cities>
            <xsl:for-each select="cities/country">
                <city name="{@capital}" isCapital="true"/>
            </xsl:for-each>
        </cities>
    </xsl:template>
</xsl:stylesheet>

我的python代码：

import os
import xml.etree.ElementTree as ET
from saxonpy import PySaxonProcessor

def main():
    print('starting code...')
    source_XML = '''
        <data>
            <country name="Denmark" capital="Copenhagen"/>
            <country name="Germany" capital="Berlin"/>
            <country name="France" capital="Paris"/>
        </data>
    '''
    parentroot = ET.fromstring(source_XML)
    children = list(parentroot)

    # create individual raw xmls
    cnt = 0
    for child in children:
        cnt = cnt + 1
        childroot = ET.Element("cities")
        childroot.append(child)
        tempfile_tree = ET.ElementTree(childroot)
   
        # tempfile = "C:\pythonProject\Whosebug\tmp.xml"
        # tempfile = "C:\gaga\tmp.xml"
        # tempfile = os.path.abspath("tmp.xml")
        tempfile = "tmp.xml"

        transformedfile = f"output_{cnt}.xml"
        with open(tempfile, 'wb') as f:
            tempfile_tree.write(f, encoding='utf-8', xml_declaration=True)

        try:
            with PySaxonProcessor(license=False) as proc:
                proc.set_cwd(os.getcwd())
                xsltproc = proc.new_xslt30_processor()
                xsltproc.transform_to_file(source_file=tempfile,
                                           stylesheet_file="transformer.xsl",
                                           output_file=transformedfile)
                print(f"{transformedfile} has been created.")
        except Exception as e:
            print(e)

if __name__ == "__main__":
    main()

我的问题

我导入了 saxonpy。我试图在一个循环中运行 saxonc 的 transform_to_file() 。我无法获得转换后的输出文件。根据我为临时文件设置的内容，我得到

        #   I/O error reported by XML parser processing C:\pythonProject\Whosebug\░╚╒E ⌂:
        #   unknown protocol: c. Caused by java.net.MalformedURLException: unknown protocol: c

或

Content is not allowed in prolog
(this is definitely not the case, I checked the tempfile with a hexeditor)

或没有错误但输出文件仅包含：

        # <?xml version="1.0" encoding="UTF-8"?>
        # <cities/>

还有正确的输出（但我不能再重现了）。

注意：我在安装 python 3.10 时禁用了 MAX_PATH。注意：使用 Pycharm 与 poetry venv

Answer 1

使用 SaxonC 11.3 我设法运行上面的 python 脚本稍作改动：

from saxonpy import PySaxonProcessor

替换为：

from saxonc import *

我得到了输出：

starting code...
output_1.xml has been created.
output_2.xml has been created.
output_3.xml has been created.

这些文件都有以下内容：

<?xml version="1.0" encoding="UTF-8"?>
<cities/>

作为解决方法，我将 transform_to_file 替换为 transform_to_string:

                valueStr = xsltproc.transform_to_string(source_file=tempfile,
                                           stylesheet_file="transformer.xsl")
                                           #output_file=transformedfile)
                print(valueStr)

这确实产生了正确的输出：

starting code...
source in transformFiletoString=tmp.xml stylsheet=transformer.xsl
<?xml version="1.0" encoding="UTF-8"?>
<cities>
   <city name="Copenhagen" isCapital="true"/>
</cities>

output_1.xml has been created.

<?xml version="1.0" encoding="UTF-8"?>
<cities>
   <city name="Berlin" isCapital="true"/>
</cities>

output_2.xml has been created.

<?xml version="1.0" encoding="UTF-8"?>
<cities>
   <city name="Paris" isCapital="true"/>
</cities>

output_3.xml has been created.

Answer 2

我现在已经安装了 SaxonC 1.2.1

我使用以下 python 脚本得到了正确的输出：

import os
import xml.etree.ElementTree as ET
from saxonpy import *

def main():
    print('starting code...')
    source_XML = '''
        <data>
            <country name="Denmark" capital="Copenhagen"/>
            <country name="Germany" capital="Berlin"/>
            <country name="France" capital="Paris"/>
        </data>
    '''
    parentroot = ET.fromstring(source_XML)
    children = list(parentroot)

    # create individual raw xmls
    try:
        with PySaxonProcessor(license=False) as proc:
            proc.set_cwd(os.getcwd())
            xsltproc = proc.new_xslt30_processor()
            cnt = 0
            for child in children:
                cnt = cnt + 1
                childroot = ET.Element("cities")
                childroot.append(child)
                tempfile_tree = ET.ElementTree(childroot)
   
                # tempfile = "C:\pythonProject\Whosebug\tmp.xml"
                # tempfile = "C:\gaga\tmp.xml"
                # tempfile = os.path.abspath("tmp.xml")
                tempfile = "tmp.xml"

                transformedfile = f"output_{cnt}.xml"
                with open(tempfile, 'wb') as f:
                    tempfile_tree.write(f, encoding='utf-8', xml_declaration=True)

                    xsltproc.set_property("s",tempfile)
                    xsltproc.transform_to_file(source_file=tempfile,
                                           stylesheet_file="transformer.xsl",
                                           output_file=transformedfile)
                    #print(valueStr)
                    print(f"{transformedfile} has been created.")
    except Exception as e:
        print(e)

if __name__ == "__main__":
    main()

Answer 3

使用 Apply_templates_returning_file() 有效：

import os
import xml.etree.ElementTree as ET
from saxonpy import PySaxonProcessor

def main():
    print('starting code...')
    source_XML = '''
        <data>
            <country name="Denmark" capital="Copenhagen"/>
            <country name="Germany" capital="Berlin"/>
            <country name="France" capital="Paris"/>
        </data>
    '''
    parentroot = ET.fromstring(source_XML)
    children = list(parentroot)

    try:
        with PySaxonProcessor(license=False) as proc:
            proc.set_cwd(os.getcwd())
            xsltproc = proc.new_xslt30_processor()
            xslt30_transformer = xsltproc.compile_stylesheet(stylesheet_file="transformer.xsl")

            cnt = 0
            for child in children:
                cnt = cnt + 1
                childroot = ET.Element("cities")
                childroot.append(child)
                tempfile_tree = ET.ElementTree(childroot)

                tempfile = "tmp_1234567890ABCDEFGHIJKLMNOP.xml"
                transformedfile = f"output_{cnt}.xml"

                with open(tempfile, 'wb') as f:
                    tempfile_tree.write(f, xml_declaration=True)

                xslt30_transformer.apply_templates_returning_file(source_file=tempfile,
                                                                  output_file=transformedfile)
                print(f"{transformedfile} has been created.")

    except Exception as e:
        print(e)

if __name__ == "__main__":
    main()

saxonc 的 transform_to_file()，在循环中执行，不转换但给出无意义的错误或部分输出

saxonc's transform_to_file(), executed in a loop, doesn't transform but gives non-sensical errors or partial output

python

xml

xslt

saxon-c