def iirdesign(wp, ws, gpass, gstop, analog=False, ftype='ellip', output='ba'):
 try:
  ordfunc = filter_dict[ftype][1]
 except KeyError:
  raise ValueError(('Invalid IIR filter type: %s' % ftype))
 except IndexError:
  raise ValueError(('%s does not have order selection. Use iirfilter function.' % ftype))
 wp = atleast_1d(wp)
 ws = atleast_1d(ws)
 band_type = (2 * (len(wp) - 1))
 band_type += 1
 if (wp[0] >= ws[0]):
  band_type += 1
 btype = {1: 'lowpass', 2: 'highpass', 3: 'bandstop', 4: 'bandpass'}[band_type]
 (N, Wn) = ordfunc(wp, ws, gpass, gstop, analog=analog)
 return iirfilter(N, Wn, rp=gpass, rs=gstop, analog=analog, btype=btype, ftype=ftype, output=output)

def iirdesign ( wp , ws , gpass , gstop , analog = False , ftype = 'ellip' , output = 'ba' ) : try : ordfunc = filter_dict [ ftype ] [ 1 ] except KeyError : raise ValueError ( ( 'Invalid IIR filter type: %s' % ftype ) ) except IndexError : raise ValueError ( ( '%s does not have order selection. Use iirfilter function.' % ftype ) ) wp = atleast_1d ( wp ) ws = atleast_1d ( ws ) band_type = ( 2 * ( len ( wp ) - 1 ) ) band_type += 1 if ( wp [ 0 ] >= ws [ 0 ] ) : band_type += 1 btype = { 1 : 'lowpass' , 2 : 'highpass' , 3 : 'bandstop' , 4 : 'bandpass' } [ band_type ] ( N , Wn ) = ordfunc ( wp , ws , gpass , gstop , analog = analog ) return iirfilter ( N , Wn , rp = gpass , rs = gstop , analog = analog , btype = btype , ftype = ftype , output = output )
complete iir digital and analog filter design .