Python Variables Passed as Parameters


  • you get copies of values for parameters (pass-by-value)
  • the variable has not been changed
  • these are primitive types
  • examples: integer, float, Boolean, string


  • these variables act like they have a URL that is being copied (pass-by-reference)
  • you get reference (the URL) for parameters
  • they are changed in place when you assign
  • non-primitive types
  • examples: canvas, pixel, SimpleImage, list

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