xml.dom.minidom + py2exe

[Gordon McMillan]

Martin von Loewis wrote: 

> "Thomas Heller" <thomas.heller at ion-tof.com> writes:
> 
>> > It looks like the XML module is using som kind of dynamic loader
>> > (like Pmw does), and these modules naturally escape py2exe. 
>> 
>> This is indeed the case:
>> 
>> C:\sf\py2exe\tests>c:\python20\python.exe
>> Python 2.0 (#8, Apr 25 2001, 22:09:02) [MSC 32 bit (Intel)] on win32
>> Type "copyright", "credits" or "license" for more information.
>> >>> import xml
>> >>> xml
>> <module '_xmlplus' from 'c:\python20\_xmlplus\__init__.pyc'>
> 
> _xmlplus is provided by PyXML, so it is only available if PyXML is
> installed. OTOH, this was not the problem for py2exe: It (correctly)
> detected that _xmlplus could not be found, this is triggered by
> xml/__init__.py's
> 
> try:
>     import _xmlplus
> except ImportError:
>     pass
> else:
>     ...
> 
> Here is a clear import statement for _xmlplus, but it is no problem if
> that fails. What did cause the problem is the code
> 
> default_parser_list = ["xml.sax.expatreader"]
> ...
>     for parser_name in parser_list + default_parser_list:
>         try:
>             return _create_parser(parser_name)
>         except ImportError,e:
>             import sys
> ...
>     def _create_parser(parser_name):
>         drv_module = __import__(parser_name,{},{},['create_parser'])
>         return drv_module.create_parser()
> 
> in xml/sax/__init__.py. So for freezing (py2exeing?) XML applications,
> you have to give xml.sax.expatreader as a 'static' module, and
> perhaps any additional parsers you may want to use.

You have to do a lot more than that. After all, once xml/__init__.py
runs and swaps itself for _xmlplus/__init__.py, then xml.sax.expatreader
refers to _xmlplus/sax/expatreader.py.

But when you're freezing, xml.sax.expatreader refers to 
xml/sax/expatreader.py. That is, because you're using an honest
"import" in xml/__init__.py, the dependency on _xmlplus/__init__.py
can be traced. But that doesn't mean that freeze realizes that
"xml" is an alias for "_xmlplus".

- Gordon