import itchat
import math
import PIL.Image as Image
import os

itchat.auto_login()
friends = itchat.get_friends(update=True)[0:]
user = friends[0]["UserName"]

num = 0
for i in friends:
 img = itchat.get_head_img(userName=i["UserName"])
 fileImage = open('文件夹' + "/" + str(num) + ".jpg",'wb')
 fileImage.write(img)
 fileImage.close()
 num += 1

ls = os.listdir('文件夹')
each_size = int(math.sqrt(float(640*640)/len(ls)))
lines = int(640/each_size)
image = Image.new('RGBA', (640, 640))
x = 0
y = 0
for i in range(0,len(ls)+1):
 try:
  img = Image.open('文件夹' + "/" + str(i) + ".jpg")
 except IOError:
  print("Error")
 else:
  img = img.resize((each_size, each_size), Image.ANTIALIAS)
  image.paste(img, (x * each_size, y * each_size))
  x += 1
  if x == lines:
   x = 0
   y += 1
image.save('文件夹' + "/" + "all.jpg")
itchat.send_image('文件夹' + "/" + "all.jpg", 'filehelper')