title: Deploy flask by wfastcgi to IIS, logging not work in blueprint
body: <p>I use python <code>logging</code>, it works well in simple code, when I deploy it on IIS using wfastcgi:</p>
  
  <pre><code>from flask import Flask
  from LarkLog import LarkLog
  app = Flask(__name__)
  
  @app.route("/")
  def hello():
      LarkLog.Debug('hello!')
      return "Hello Stealth!"
  
  if __name__ == '__main__':
      # manager.run() 
      app.run(host='0.0.0.0', port=5003, debug=True)
  </code></pre>
  
  <p>But when I deploy my real project which using blueprint, it works well except logging module not work. It does not logging anything, but an empty log file created.</p>
  
  <p>Any suggestion? Thanks!</p>