code: def test_init_push_feed():
      s1 = Stream.placeholder(dtype="float").rename("s1")
      s2 = Stream.placeholder(dtype="float").rename("s2")
  
      feed = PushFeed([s1, s2])
  
      assert isinstance(feed, PushFeed)
  
imports: from tensortrade.feed import Stream
  from tensortrade.feed.core.feed import PushFeed
label_desc: Use image node_id 1 for calling a global function with example usage: test_init_push_feed() without return types