convert powerpoint to xml format for bunch of powerpoint files

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I need to convert bunch of powerpoint files into xml format.

I have to change the all fonts in about 100 powerpoint files, without opening the files. There are several shape types in each slide and each might have a different font. I used python-pptx package and wrote the some code to change the fonts of all texts in a powerpoint presentation. But, it turned out that it does not work for all languages (see change all fonts in powerpoint without opening the file for more details).

I saved the powerpoint file as xml and then changed all fonts in there. Then, when I open the file with powerpoint it works OK, all fonts are changed!. Now, I am trying to save all those powerpoint files as .xml using a python code. I seared to see if python-pptx provides such a functionality or not, and I could not find anything.

============================= update=== I used opc extract and I got:

` opc extract .\f10.pptx
usage: opc extract [-h] PKG_PATH DIRPATH
opc extract: error: the following arguments are required: DIRPATH
(base) PS C:\Users\a_oro\Downloads\pptxfile> opc extract f10.pptx .
Traceback (most recent call last):
  File "c:\users\a_oro\miniconda3\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\a_oro\miniconda3\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\a_oro\Miniconda3\Scripts\opc.exe\__main__.py", line 7, in <module>
  File "c:\users\a_oro\miniconda3\lib\site-packages\opcdiag\cli.py", line 304, in main
    command_controller.execute(argv)
  File "c:\users\a_oro\miniconda3\lib\site-packages\opcdiag\cli.py", line 53, in execute
    command.execute(args, self._app_controller)
  File "c:\users\a_oro\miniconda3\lib\site-packages\opcdiag\cli.py", line 228, in execute
    app_controller.extract_package(args.pkg_path, args.dirpath)
  File "c:\users\a_oro\miniconda3\lib\site-packages\opcdiag\controller.py", line 66, in extract_package
    package.prettify_xml()
  File "c:\users\a_oro\miniconda3\lib\site-packages\opcdiag\model.py", line 54, in prettify_xml
    for pkg_item in self._pkg_items.itervalues():
AttributeError: 'dict' object has no attribute 'itervalues'

I appreciate any help or comment.

python-pptx powerpoint python
1 Answers

There is a companion package called opc-diag which can help with parts of this. You install it with:

pip install opc-diag

And then from the command-line you can:

opc extract PPTXFILE DIRECTORY

This "unpackages" the .pptx "package" into its component parts (files), most of which are XML. It also reformats them for easy editing instead of "the whole file on one line" format in which they are stored by PowerPoint.

So then you can do some global edit with sed I suppose or whatever you decide.

Then you can do:

opc repackage DIRECTORY PPTX-FILE

and you get a loadable .pptx file again, after your changes.

So putting it all together:

opc extract my.pptx working_dir
# --- run editing script or edit files by hand ---
opc repackage working_dir my_edited.pptx
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