To send emails with CC and BCC using Python and Twilio SendGrid, first set up your development environment by installing Python, creating a free SendGrid account, and setting an API key as an environment variable. Then, install the virtualenv package and activate it to create a new virtual environment, and install the SendGrid Python library. Next, write a Python script called `send_email.py` that uses the SendGrid API to send an email with CC and BCC recipients, replacing the placeholder addresses with your own values. Finally, run the script in your terminal to test sending an email, and consider exploring additional features of the SendGrid service for more advanced use cases.