Update shiny for python cheatsheet

[gshotwell]

Contributed Cheatsheet Information

Cheatsheet Name: Shiny for Python
1 sentence description of the contents:
Your Name (as you want to be credited on the website):
A link to your github/website (optional):
A link to relevant package documentation (optional):
Date created/updated (Month YYYY format):

Please be sure you've included the Creative Commons License:

• Add CC-BY-SA Your Name to copywrite under the Creative Commons on the cheatsheet

Check that you have done the following:

• Used descriptive file names, something like package-name.pdf or task-name.pdf and did not include "cheatsheet" in the title.
• Included a PDF file of entire cheatsheet.
• Included a PNG file of the first page size 1100 x 850 in the pngs folder (for the website thumbnail).
• Included a Keynote or PowerPoint or similar file in the relevant folder (helps translators who want to translate your cheatsheet).

Translated Cheatsheet Information

Cheatsheet Name:
Language:
Your Name (as you want to be credited on the website):
Date created/updated (Month YYYY format):

Check that you have done the following:

• Added the language abbreviation to the file name (ex. data-transformation_es.pdf).
• Included a PDF file of your translated cheatsheet to the translation folders.
• Included a Keynote or PowerPoint file for your translated cheatsheet to the translation folder.
• Not duplicated an existing translation. If an existing translation exists, I have edited it.

[mine-cetinkaya-rundel]

Thank you! Would you make the corresponding changes in the Keynote file as well please? This way we can get the PDF for printing.

And addressing #332 if not yet done would be great as well. Thanks!