new_contents: import hashlib
  from flask import Flask,request
  app = Flask(__name__)
  
  @app.route('/')
  def wx_verify():
  	signature = request.args.get('signature', '')
  	timestamp = request.args.get('timestamp', '')
  	nonce = request.args.get('nonce', '')
  	echostr = request.args.get('echostr', '')
  	#PUT YOUR TOKEN HERE
  	token = ''
  	L = [token, timestamp, nonce]
  	L.sort()
  	s = L[0] + L[1] + L[2]
  	s = s.encode('utf8')
  	if hashlib.sha1(s).hexdigest() == signature:
  		return echostr
  	else:
  		return 'Error'
  
subject: Create wx_verify.py