Update README.md

README.md

@@ -117,9 +117,17 @@ size_categories:
 
 ## Usage
 
+Prerequisites:
+```bash
+pip install datasets install zstandard jsonlines pysimdjson
+```
+
+Dataset iteration:
 ```python
 from datasets import load_dataset
-dataset = load_dataset('IlyaGusev/habr', split="train")
+dataset = load_dataset('IlyaGusev/habr', split="train", streaming=True)
+for example in dataset:
+    print(example["text_markdown"])
 ```
 
 ## Data Instances