Shiny for Python

• pip install shiny

• There is core vs express versions of Shiny Python. Express has limited capabilities

• Use breakpoint() to debug

• The difference

  • reactive.effect is equivalent to observe in R; triggers immediately
  • reactive.calc is equivalent to reactive in R; lazy eval, requires function to be called to execute
  • https://shiny.posit.co/py/api/core/reactive.effect.html

Deploy

• pip install rsconnect-python

• Set up machine with shinyapps credentials:

  • Login to PSRC's shinyapps.io account.
  • Navigate to Account > Tokens.
  • Select a token and click 'Show'.
  • Select 'With Python'
  • Show all tokens and secret then 'Copy to clipboard'
  • Paste and run in terminal

• To deploy: rsconnect deploy shiny C:/Users/CLam/github/shiny-py --name psrcwa --title test-shiny-py1

• URL: https://psrcwa.shinyapps.io/test-shiny-py1/