From 49fbfda82df441f396b614bae551682e69799af8 Mon Sep 17 00:00:00 2001
From: Paul Seyfert <pseyfert.mathphys@gmail.com>
Date: Mon, 29 Oct 2018 10:23:50 +0100
Subject: [PATCH] mention progress bar usage of read_root in README

---
 README.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/README.md b/README.md
index 3300685..c698317 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,19 @@ parts of a single large `DataFrame`.
 
 You can also combine any of the above options at the same time.
 
+Reading in chunks also supports progress bars
+```python
+from progressbar import ProgressBar
+pbar = ProgressBar()
+for df in pbar(read_root('bigfile.root', chunksize=100000)):
+    # process df here
+
+# or
+from tqdm import tqdm
+for df in tqdm(read_root('bigfile.root', chunksize=100000), unit="chunks"):
+    # process df here
+```
+
 ## Writing ROOT files
 
 `root_pandas` patches the pandas DataFrame to have a `to_root` method that allows you to save it into a ROOT file: