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stream.py

@@ -1,3 +1,4 @@
+from copy import deepcopy
 from typing import Dict, Iterable
 
 from datasets import Dataset, DatasetDict, IterableDataset, IterableDatasetDict
@@ -86,6 +87,10 @@ def is_stream(obj):
     return isinstance(obj, IterableDataset) or isinstance(obj, Stream) or isinstance(obj, Dataset)
 
 
+def iterable_starter(iterable):
+    return iter(deepcopy(iterable))
+
+
 class MultiStream(dict):
     """A class for handling multiple streams of data in a dictionary-like format.
 
@@ -179,7 +184,7 @@ class MultiStream(dict):
 
         return cls(
             {
-                key: Stream(iterable.__iter__, gen_kwargs={}, streaming=streaming, caching=caching)
+                key: Stream(iterable_starter, gen_kwargs={"iterable": iterable}, streaming=streaming, caching=caching)
                 for key, iterable in iterables.items()
             }
         )