やってみた。できた。ラッキー。

In [69]: pip search pptx
python-pptx               - Generate and manipulate Open XML PowerPoint (.pptx) files
opc-diag                  - Browse and diff Microsoft Office .docx, .xlsx, and .pptx files.
python-opc                - Manipulate Open Packaging Convention (OPC) files, e.g. .docx, .pptx, and .xlsx files for Microsoft Office

In [70]: pip search python-pptx
python-pptx               - Generate and manipulate Open XML PowerPoint (.pptx) files

In [71]: pip install python-pptx
Collecting python-pptx
  Downloading python-pptx-0.5.7.tar.gz (5.2MB)
Requirement already satisfied (use --upgrade to upgrade): lxml>=3.1.0 in c:winpython-64bit-3.4.3.1python-3.4.3.amd64libsite-packages (from python-pptx)
Requirement already satisfied (use --upgrade to upgrade): Pillow>=2.6.1 in c:winpython-64bit-3.4.3.1python-3.4.3.amd64libsite-packages (from python-pptx)
Requirement already satisfied (use --upgrade to upgrade): XlsxWriter>=0.5.7 in c:winpython-64bit-3.4.3.1python-3.4.3.amd64libsite-packages (from python-pptx)
Installing collected packages: python-pptx
  Running setup.py install for python-pptx
Successfully installed python-pptx-0.5.7

In [72]: from pptx import Presentation

In [73]: pip freeze
python-dateutil==2.4.0
python-pptx==0.5.7
pytz==2014.10

なーいす。

https://python-pptx.readthedocs.org/en/latest/index.html