code: def pixel(self, func:PixelFunc, *args, **kwargs)->'Image':
          "Equivalent to `image.px = func(image.px)`."
          self.px = func(self.px, *args, **kwargs)
          return self pixel(self, func:PixelFunc, *args, **kwargs)->'Image':
          "Equivalent to `image.px = func(image.px)`."
          self.px = func(self.px, *args, **kwargs)
          return self
docs: Equivalent to `image.px = func(image.px)`.