Update README

Author: hayat01sh1da

python/README.md

@@ -2,14 +2,33 @@
 
 - Python 3.14.4
 
-## 2. Execution
+## 2. Install Libraries via requirements.txt
+
+```command
+$ pip install -r requirements.txt
+```
+
+## 3. Execution
 
 ```command
-$ cd ./python
 $ python main.py
 Provide the directory name you put the JSON file in: ../json
 Provide the filename of which JSON data name you would like to sort: settings.json
 Provide asc(default) or desc you would like to sort key-value in: asc
 Start exporting JSON data in ./json/settings.json
 Done exporting JSON data in ./json/settings.json 🎉
 ```
+
+## 4. Unit Test
+
+```command
+$ pytest 
+============================= test session starts ==============================
+platform linux -- Python 3.14.4, pytest-9.0.3, pluggy-1.6.0
+rootdir: /mnt/c/Users/binlh/Documents/development/json-data-sorters/python
+collected 5 items
+
+test/test_application.py .....                                           [100%]
+
+============================== 5 passed in 0.26s ===============================
+```