old_contents: import rx
  from rx import operators as ops
  from rx.core import Observable
  
  
  
  def _merge(*args) -> Observable:
      """Merges all the observable sequences into a single observable
      sequence.
  
      1 - merged = rx.merge(xs, ys, zs)
      2 - merged = rx.merge([xs, ys, zs])
  
      Returns:
          The observable sequence that merges the elements of the
          observable sequences.
      """
  
      sources = args[:]
  
      if isinstance(sources[0], list):
          sources = sources[0]
  
      return rx.from_iterable(sources).pipe(ops.merge_all())
  
  
  
new_contents: from typing import Iterable, Union
  
  import rx
  from rx import operators as ops
  from rx.core import Observable
  
  
  
  def _merge(*args: Union[Observable, Iterable[Observable]]) -> Observable:
      """Merges all the observable sequences into a single observable
      sequence.
  
      1 - merged = rx.merge(xs, ys, zs)
      2 - merged = rx.merge([xs, ys, zs])
  
      Returns:
          The observable sequence that merges the elements of the
          observable sequences.
      """
  
      sources = args[:]
  
      if isinstance(sources[0], Iterable):
          sources = sources[0]
  
      return rx.from_iterable(sources).pipe(ops.merge_all())
  
subject: Fix typing and accept iterable instead of list