@Pipe decorator for class methods

[hansthen]

The Pipe decorator does not work on methods defined on a class.

This would be useful to make a pipe out of an existing method. As an example, I can do something like this:

class Job(requests.Session):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
  
      def get(self, items, url, *args, **kwargs):
          for item in items:
              yield super().get(url.format(item), *args, **kwargs).json()
  
      def jq(self, items, stmt):
          compiled = jq.compile(stmt)
          for item in items:
              yield from iter(compiled.input_value(item))

  job = Job()
  
  x = (
      ["hansthen", "JulienPalard"] |
      Pipe(job.get)("https://api.github.com/users/{}/repos") |
      Pipe(job.jq)(".[].license // empty | .name")
  )

But I would rather create a the Pipe at class level like this:

 class Job(requests.Session):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
  
      @Pipe
      def get(self, items, url, *args, **kwargs):
          for item in items:
              yield self.session.get(url.format(item), *args, **kwargs).json()
  
      @Pipe
      def jq(self, items, stmt):
          compiled = jq.compile(stmt)
          for item in items:
              yield from iter(compiled.input_value(item))
  
  
  job = Job()
  
  x = (
      ["hansthen", "JulienPalard"] |
      job.get("https://api.github.com/users/{}/repos") |
      job.jq(".[].license // empty | .name")
  )

Could you add a recipe to make the Pipe class work with class methods?

[AdrianCert]

I'm open to solve this issue using a little hack related to python descriptors (https://docs.python.org/3/howto/descriptor.html#dynamic-lookups)
The point here is that the issue is on the self referice that got losed on creation (will be one option). Other option that we don't care at all of the self referince is to mimic what @property do witch is also backend by the python descriptors!

[hansthen]

I'm not sure if I understand your points correctly, but if there is a way to use the @Pipe construct on methods, that would be amazing!

[AdrianCert]

@JulienPalard Since #106 has been merged, this issue can be closed. I'm looking forward to seeing these changes released!