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Python's None problem, and how Mypy helps you deal with it

by jrheard on 12/1/21, 6:53 PM with 1 comments

• by uniqueuid on 12/1/21, 7:02 PM

  Typing is a great addition to Python, but despite all the effort, it's still a band-aid. It doesn't ultimately solve the issue with checking single return values and/or exceptions.

  I'm in awe every time I see how elegant this is in Erlang/Elixir:

      case HTTPoison.get(url) do
        {:ok, %HTTPoison.Response{body: body, status_code: 200}} ->
          IO.puts body
        {:error, %HTTPoison.Error{reason: reason}} ->
          IO.inspect reason
      end
  
  

  Pattern matching on return tuples is really amazing.