Python script to interact with Wit

audio-test.py

import pyaudio
from array import array
import wave
import requests
import json

CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
MAX_RECORD_SECONDS = 10
WAVE_OUTPUT_FILENAME = "output.wav"
RUNNING = True
DEBUG = False

p = pyaudio.PyAudio()

while RUNNING:
    stream = p.open(format=FORMAT,
                    channels=CHANNELS,
                    rate=RATE,
                    input=True,
                    frames_per_buffer=CHUNK)

    if DEBUG: print("* listening")

    frames = []
    recording = False
    silent_time = 0

    for i in range(0, int(RATE / CHUNK * MAX_RECORD_SECONDS)):
        data = stream.read(CHUNK)
        if max((array('h', data))) > 1000:
            if not recording:
                if DEBUG: print("* recording")
                else: print("****")
            recording = True
            silent = 0
        elif recording:
            silent += 1
            if DEBUG: print('silent: ' + str(silent))
            if silent > 30:
                if DEBUG: print("* done recording")
                break
        if recording:
            if DEBUG: print(max((array('h', data))))
            frames.append(data)

    if DEBUG: print("* processing")
    else: print("----")

    stream.stop_stream()
    stream.close()

    wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
    wf.setnchannels(CHANNELS)
    wf.setsampwidth(p.get_sample_size(FORMAT))
    wf.setframerate(RATE)
    wf.writeframes(b''.join(frames))
    wf.close()

    rf = open(WAVE_OUTPUT_FILENAME, 'rb')
    d = rf.read()
    rf.close()

    r = requests.post('https://api.wit.ai/speech',
            data=d,
            headers={
                'content-type': 'audio/wave',
                'authorization': 'Bearer SECRETKEY'
            }
        )

    if r.status_code == 200:
        res = r.json()
        print("I heard: " + res['msg_body'])
        if res['outcome']['intent'] == 'quit':
            RUNNING = False
    elif DEBUG:
        print("Error: " + r.text)

p.terminate()