Python Programmer for RESTful API Function

I need a Python programmer to write a function for me that will call a RESTful API.

Key Requirements:
- The function should be able to retrieve data from the API.
- It should be capable of sending and receiving JSON data.

Ideal Skills:
- Proficiency in Python programming.
- Experience with RESTful APIs.
- Familiarity with handling JSON data.

Please reach out if you can assist with this project.