IOError: [Errno -9998] Invalid number of channels when using PyAudio on Spyder (Python 2.7)

I'm fairly new to coding and I'm trying to make an audio visualizer on Spyder. Currently I've been getting an error message which is:

    runfile('/Users/christinanguyen/Downloads/audio visualizer code.py', wdir='/Users/christinanguyen/Downloads')
Traceback (most recent call last):

  File "<ipython-input-34-a74bf7660894>", line 1, in <module>
    runfile('/Users/christinanguyen/Downloads/audio visualizer code.py', wdir='/Users/christinanguyen/Downloads')

  File "/Users/christinanguyen/anaconda2/lib/python2.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 704, in runfile
    execfile(filename, namespace)

  File "/Users/christinanguyen/anaconda2/lib/python2.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 100, in execfile
    builtins.execfile(filename, *where)

  File "/Users/christinanguyen/Downloads/audio visualizer code.py", line 22, in <module>
    input_device_index = 2)

  File "/Users/christinanguyen/anaconda2/lib/python2.7/site-packages/pyaudio.py", line 750, in open
    stream = Stream(self, *args, **kwargs)

  File "/Users/christinanguyen/anaconda2/lib/python2.7/site-packages/pyaudio.py", line 441, in __init__
    self._stream = pa.open(**arguments)

IOError: [Errno -9998] Invalid number of channels

this is my code for the visualizer so far:

import pygame as pg
import pyaudio
import numpy as np
from pygame.locals import (HWSURFACE, DOUBLEBUF, RESIZABLE)  
from math import ceil

CHUNK =512
drawChunk = 32
RATE = 44100
CHANNELS = 1



p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16,
              channels=1,
              input=True,
              rate=RATE,
              frames_per_buffer=CHUNK,
              input_device_index = 2)
def get_dataS(stream,CHUNK):
    data = np.fromstring(stream.read(CHUNK,exception_on_overflow = False),dtype=np.int16)
    peak=np.average(np.abs(data))
    return(peak/50)


pg.init()
screen = pg.display.set_mode((500,500),HWSURFACE|DOUBLEBUF|RESIZABLE)
clock = pg.time.Clock()
done = False
spriteGroup = pg.sprite.Group()
drawGroup = pg.strite.Group()
bars = 70
flashclock = 0
flashdur = 50

class SimpleBeatDetection:
   def __init__(self, history = 10):
       self.local_energy = np.zeros(history) #simple ring buffer
       self.local_energy_index = 0 #the index of the oldest element

   def detect_beat(self, signal):

       samples = signal.astype(np.int) #room for squares
       instant_energy = np.dot(samples, samples) / float(0xffffffff) #normalize

       local_energy_average = self.local_energy.mean()
       local_energy_variance = self.local_energy.var()

       beat_sensibility = (-0.002 * local_energy_variance) +2.7
       beat = instant_energy > beat_sensibility * local_energy_average

       self.local_energy_index -=1
       if self.local_energy_index < 0:
           self.local_energy_index = len(self.local_energy) - 1

       return beat
beater = SimpleBeatDetection
for i in range(bars):
       spriteGroup.add(bars((i*ceil(pg.display.get_surface().get_size()[0]/bars),pg.display.get_surface().get_size()[1]-32),
       (ceil(pg.display.get_surface().get_size()[0]/bars),4),
       color=(0x8E7CC3)))
       fps = 0

while not done:
       for event in pg.event.get():
           if event.type == pg.QUIT:
               done = True



       for i in spriteGroup:
           i.update((get_dataS(stream,drawChunk)),clock.get_time())
       if (beater.detect_beat(np.frombuffer(stream.read(CHUNK,exception_on_overflow = False), np.int16))):
               screen.fil(0xFFFFFF)
               flashclock = 0
       if flashclock < flashdur:
           screen.fill(0xFFFFFF)
           flashclock+=clock.get_time()
       else:
           screen.fill(0)

       spriteGroup.draw(screen)
       pg.display.flip()
       clock.tick(fps)
pg.quit

I have a Macbook Air (13 inch Early 2014) and am running Spyder 2.7 Python. I'm guessing it's something with my audio channels on my computer but I am not very sure.