PyAudio recording/capturing and stop/terminate in Python on Raspi

I am not an expert of Python, trying to capture/record the Audio by USB audio device. It is working fine on command terminal. But I want to make a program which just recording audio and stop when I want.

I heard ab8 Pyaudio library which has certain API to perform this job(like pyaudio.PyAudio(), pyaudio.Pyaudio.open(), pyaudio.stream, pyaudio.stream.close, pyaudio.PyAudio.terminate().....

Can somebody help to make a simple program for audio recording in Python? Thank you.