百度语音识别API的python使用示例

    #encoding=utf-8  
      
    import wave  
    import urllib,urllib2,pycurl  
    import base64  
    import json  
    ## get access token by api key & secret key  
      
    def get_token():  
        apiKey = "xxxxxxxx"  
        secretKey = "xxxxxxxxx"  
      
        auth_url = "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=" + apiKey + "&client_secret=" + secretKey;  
      
        res = urllib2.urlopen(auth_url)  
        json_data = res.read()  
        return json.loads(json_data)['access_token']  
      
    def dump_res(buf):  
        print buf  
      
      
    ## post audio to server  
    def use_cloud(token):  
        fp = wave.open('vad_0.wav','rb')  
        nf = fp.getnframes()  
        f_len = nf * 2  
        audio_data = fp.readframes(nf)  
      
        cuid = "xxxxxxxxxx" #my xiaomi phone MAC  
        srv_url = 'http://vop.baidu.com/server_api' + '?cuid=' + cuid + '&token=' + token  
        http_header = [  
            'Content-Type: audio/pcm; rate=8000','Content-Length: %d' % f_len  
        ]  
      
        c = pycurl.Curl()  
        c.setopt(pycurl.URL,str(srv_url)) #curl doesn't support unicode  
        #c.setopt(c.RETURNTRANSFER,1)  
        c.setopt(c.HTTPHEADER,http_header)   #must be list,not dict  
        c.setopt(c.POST,1)  
        c.setopt(c.CONNECTTIMEOUT,30)  
        c.setopt(c.TIMEOUT,30)  
        c.setopt(c.WRITEFUNCTION,dump_res)  
        c.setopt(c.POSTFIELDS,audio_data)  
        c.setopt(c.POSTFIELDSIZE,f_len)  
        c.perform() #pycurl.perform() has no return val  
      
    if __name__ == "__main__":  
        token = get_token()  
        use_cloud(token)  

{"corpus_no":"6150045491002357923","err_msg":"success.","err_no":0,"result":["播放小苹果，"],"sn":"243903724071431919050"}