Update sample code

README.md

@@ -37,7 +37,7 @@ Then `cd SBI-16-3D` and start python like:
 
 ```python
 from datasets import load_dataset
-dataset = load_dataset("./GBI-16-2D.py", "tiny", data_dir="./data/", streaming=True, trust_remote_code=True)
+dataset = load_dataset("./GBI-16-2D.py", "tiny", data_dir="./data/", writer_batch_size=1, trust_remote_code=True)
 ds = dataset.with_format("np")
 ```
 
@@ -69,6 +69,6 @@ Then in your python script:
 
 ```python
 from datasets import load_dataset
-dataset = load_dataset("AstroCompress/GBI-16-2D", "tiny", streaming=True, trust_remote_code=True)
+dataset = load_dataset("AstroCompress/GBI-16-2D", "tiny", writer_batch_size=1, trust_remote_code=True)
 ds = dataset.with_format("np")
 ```