title: how to get phase fft of a signal &-- can i get phase in time domain?
body: <p>i can get magnitude of signal coming from .wav file , but how to get the phase of that signal too ,,, 
  Here is the where i browse for .wav file and extract the signal </p>
  
  <pre><code>def browse_wav(self):
  
      filepath = QtGui.QFileDialog.getOpenFileName(self, 'Single File', "C:\Users\Hanna Nabil\Documents",'*.wav')
      f= str(filepath)
      if f != "":
          spf = wave.open(f, 'r')
      import contextlib
  
      with contextlib.closing(wave.open(f, 'r')) as f:
          frames = f.getnframes()
          rate = f.getframerate()
          duration = frames / float(rate)
          print "Duration is " , duration
  
      # Extract Raw Audio from Wav File
      self.signal = spf.readframes(-1)
      self.signal = np.fromstring(self.signal, 'Int16')
      self.fs = spf.getframerate()
      print "Sampling Rate is " ,self.fs
  
      # If Stereo
      if spf.getnchannels() == 2:
          print 'Just mono files'
          sys.exit(0)
  
      #self.time = np.linspace(0, len(self.signal) / fs, num=len(self.signal))
      self.time = np.linspace(0, duration, self.fs * duration)
  
      self.xfourier = fftfreq(self.signal.size, d=self.time[1] - self.time[0])
      self.yfourier = np.abs(fft(self.signal))  # signal magnitude
  
      self.zico = self.yfourier
      self.cut_signal = ifft(self.zico)
  </code></pre>