<type 'exceptions.AttributeError'>
Python 2.7.15+: /usr/bin/python2
Tue Oct 19 09:54:55 2021

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.

 /var/www/artrz.ru/htdocs/src/index.py in <module>()
    307                                         ext, blob = pcur.fetchone()
    308                                         ext = ext and ext.lower()
=>  309                                         result = blob.read()
    310                                         types = {
    311                                                 "pdf": "application/pdf",
result = '', blob = None, blob.read undefined

<type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'read'
      args = ("'NoneType' object has no attribute 'read'",)
      message = "'NoneType' object has no attribute 'read'"