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   Alexandre B A Villares 🐍 (villares@ciberlandia.pt)'s status on Tuesday, 03-Dec-2024 15:08:36 JST Alexandre B A Villares 🐍

   If you are coming to #Python from a language that doesn't have "mappings on your fingertips" you must learn about dictionaries (type dict):

   https://docs.python.org/3/library/stdtypes.html#mapping-types-dict

   (The other 3 essential containers are lists, tuples and sets)

   • Embed this notice
     Eduardo Mendes :python: (dunossauro@bolha.us)'s status on Tuesday, 03-Dec-2024 15:08:30 JST Eduardo Mendes :python:

     in reply to

     • maco

     @maco @villares

     When I teach functional programming classes for Pythonistas, I usually use two external libraries that can be very useful in the migration process.

     Pyrsistent for immutable containers: https://github.com/tobgu/pyrsistent

     And Returns for safe types functions: https://github.com/dry-python/returns

     are often useful for showing the differences in states and security. This may be helpful.

   • Embed this notice
     maco (maco@wandering.shop)'s status on Tuesday, 03-Dec-2024 15:08:31 JST maco

     in reply to

     @villares I'm just not used to mutating objects XD

     Helio Loureiro 🇧🇷 repeated this.
   • Embed this notice
     Alexandre B A Villares 🐍 (villares@ciberlandia.pt)'s status on Tuesday, 03-Dec-2024 15:08:32 JST Alexandre B A Villares 🐍

     in reply to

     • maco

     @maco yeah, the pattern in Python is that if the method mutates the object it usually returns None. Like my_list.sort(), in place, and then sorted(my_list), gets you a new list.

   • Embed this notice
     maco (maco@wandering.shop)'s status on Tuesday, 03-Dec-2024 15:08:33 JST maco

     in reply to

     @villares no, I haven't. Today for Advent of Code I learned about collections.deque but then spent a while fighting bugs caused by assuming I could do

     thing.appendleft(foo).appendleft(bar)

   • Embed this notice
     Alexandre B A Villares 🐍 (villares@ciberlandia.pt)'s status on Tuesday, 03-Dec-2024 15:08:34 JST Alexandre B A Villares 🐍

     in reply to

     • maco

     @maco these None returning functions are analogous to what we called "procedures" in Pascal, not really functions :)

     On the other hand we have nice "comprehensions" borrowed from Haskell. https://docs.python.org/3/howto/functional.html#generator-expressions-and-list-comprehensions

     By the way, have you heard of https://coconut-lang.org ?

   • Embed this notice
     maco (maco@wandering.shop)'s status on Tuesday, 03-Dec-2024 15:08:35 JST maco

     in reply to

     @villares and if you’re coming from functional programming, you have to learn about impure functions that return None instead of the thing you thought they were going to return.