improve README.md

README.md

@@ -46,3 +46,33 @@ from stqdm import stqdm
 for _ in stqdm(range(50), desc="This is a slow task", mininterval=1):
     sleep(0.5)
 ```
+
+### Display a progress bar during pandas Dataframe & Series operations
+STqdm inherits from tqdm, you can call stqdm.pandas() in a similar way. See [tqdm docs](https://github.com/tqdm/tqdm#pandas-integration).
+```python
+from time import sleep
+
+import pandas as pd
+from stqdm import stqdm
+
+stqdm.pandas()
+
+pd.Series(range(50)).progress_map(lambda x: sleep(1))
+pd.Dataframe({"a": range(50)}).progress_apply(lambda x: sleep(1), axis=1)
+```
+
+### Display the progress bar only in the frontend or the backend
+
+```python
+from time import sleep
+
+from stqdm import stqdm
+
+# Default to frontend only
+for i in stqdm(range(50), backend=False, frontend=True):
+    sleep(0.5)
+
+
+for i in stqdm(range(50), backend=True, frontend=False):
+    sleep(0.5)
+```