diff --git a/python/README.md b/python/README.md
index 39cd241..73e9677 100644
--- a/python/README.md
+++ b/python/README.md
@@ -1,4 +1,5 @@
 # PH Evaluator Python package (phevaluator)
+
 [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/HenryRLee/PokerHandEvaluator/CI?color=green&logo=github)](https://github.com/HenryRLee/PokerHandEvaluator/actions/workflows/ci.yml)
 [![PyPI version](https://badge.fury.io/py/phevaluator.svg)](https://badge.fury.io/py/phevaluator)
 [![PyPI downloads](https://img.shields.io/pypi/dm/phevaluator)](https://shields.io/category/downloads)
@@ -15,18 +16,25 @@ modification, the same algorithm can be also applied to evaluating Omaha
 poker hands.
 
 ## Installation
+
 The library requires Python 3.
+
 - from release on PyPI
+
     ```shell
     pip install phevaluator
     ```
+
 - from source code
+
     ```shell
     pip install .
     ```
 
 ## Using the library
+
 The main function is the `evaluate_cards` function.
+
 ```python
 from phevaluator.evaluator import evaluate_cards
 
@@ -37,11 +45,16 @@ p2 = evaluate_cards("9c", "4c", "4s", "9d", "4h", "2c", "9h")
 print(f"The rank of the hand in player 1 is {p1}") # 292
 print(f"The rank of the hand in player 2 is {p2}") # 236
 ```
-The function can take both numbers and card strings (with a format like: 'Ah' or '2C'). Usage examples can be seen in `examples.py`.
+
+The function can take both numbers and card strings (with a format like: 'Ah' or
+'2C'). Usage examples can be seen in `examples.py`.
 
 ## Test
-- The pre-calculated tables (`phevaluator.tables`) are tested by comparing them with the tables generated by test codes.
-- The functionality of the evaluators is tested by comparing with the JSON files generated by the original C++ evaluator.
+
+- The pre-calculated tables (`phevaluator.tables`) are tested by comparing them
+  with the tables generated by test codes.
+- The functionality of the evaluators is tested by comparing with the JSON files
+  generated by the original C++ evaluator.
 - The functionality of the other modules is tested by its purposes.
 
 ```shell
@@ -49,20 +62,26 @@ python3 -m unittest discover -v
 ```
 
 ## Development
+
 - install from source code with `editable mode`
+
     ```shell
     pip install -e .
     ```
-    The installed package reflects changes to files inside the `phevaluator` folder automatically.
+
+    The installed package reflects changes to files inside the `phevaluator`
+    folder automatically.
 
 - recommended to format with [`black`](https://github.com/psf/black) before commit
 
     check where to correct (without formatting)
+
     ```shell
     black . --diff --color
     ```
+
     format all
+
     ```shell
     black .
     ```
-