python利用不到一百行代码实现一个小siri

# coding=utf8
import os
import wave
import dtw
import numpy as np
import pyaudio

def compute_distance_vec(vec1, vec2):
 return np.linalg.norm(vec1 - vec2) #计算两个特征之间的欧氏距离

class record():
 def record(self, CHUNK=44100, FORMAT=pyaudio.paInt16, CHANNELS=2, RATE=44100, RECORD_SECONDS=200,
 WAVE_OUTPUT_FILENAME="record.wav"):
 #录歌方法
 p = pyaudio.PyAudio()
 stream = p.open(format=FORMAT,
 channels=CHANNELS,
 rate=RATE,
 input=True,
 frames_per_buffer=CHUNK)
 frames = []
 for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
 data = stream.read(CHUNK)
 frames.append(data)
 stream.stop_stream()
 stream.close()
 p.terminate()
 wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
 wf.setnchannels(CHANNELS)
 wf.setsampwidth(p.get_sample_size(FORMAT))
 wf.setframerate(RATE)
 wf.writeframes(''.join(frames))
 wf.close()

class voice():
 def loaddata(self, filepath):
 try:
 f = wave.open(filepath, 'rb')
 params = f.getparams()
 self.nchannels, self.sampwidth, self.framerate, self.nframes = params[:4]
 str_data = f.readframes(self.nframes)
 self.wave_data = np.fromstring(str_data, dtype=np.short)
 self.wave_data.shape = -1, self.sampwidth
 self.wave_data = self.wave_data.T #存储歌曲原始数组
 f.close()
 self.name = os.path.basename(filepath) # 记录下文件名
 return True
 except:
 raise IOError, 'File Error'

 def fft(self, frames=40):
 self.fft_blocks = [] #将音频每秒分成40块，再对每块做傅里叶变换
 blocks_size = self.framerate / frames
 for i in xrange(0, len(self.wave_data[0]) - blocks_size, blocks_size):
 self.fft_blocks.append(np.abs(np.fft.fft(self.wave_data[0][i:i + blocks_size])))
 @staticmethod
 def play(filepath):
 chunk = 1024
 wf = wave.open(filepath, 'rb')
 p = pyaudio.PyAudio()
 # 播放音乐方法
 stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
 channels=wf.getnchannels(),
 rate=wf.getframerate(),
 output=True)
 while True:
 data = wf.readframes(chunk)
 if data == "": break
 stream.write(data)
 stream.close()
 p.terminate()
if __name__ == '__main__':
 r = record()
 r.record(RECORD_SECONDS=3, WAVE_OUTPUT_FILENAME='record.wav')
 v = voice()
 v.loaddata('record.wav')
 v.fft()
 file_list = os.listdir(os.getcwd())
 res = []
 for i in file_list:
 if i.split('.')[1] == 'wav' and i.split('.')[0] != 'record':
 temp = voice()
 temp.loaddata(i)
 temp.fft()
 res.append((dtw.dtw(v.fft_blocks, temp.fft_blocks, compute_distance_vec)[0],i))
 res.sort()
 print res
 if res[0][1].find('open_qq') != -1:
 os.system('C:programTencentQQBinQQScLauncher.exe') #我的QQ路径
 elif res[0][1].find('zhimakaimen') != -1:
 os.system('chrome.exe')#浏览器的路径，之前已经被添加到了Path中了
 elif res[0][1].find('play_music') != -1:
 voice.play('C:datamusic\audio\audio\ (9).wav') #播放一段音乐
 # r = record()
 # r.record(RECORD_SECONDS=3,WAVE_OUTPUT_FILENAME='zhimakaimen_09.wav')