tornado psycopg2

[Nikosznb]

Alright when I run python3 main.py I get this :
2020-02-20 12:50:29,223 Database.py:22 _error_: _error_ connecting to database
2020-02-20 12:50:29,224 Database.py:27 _error_: Intialization needs connection fir st
2020-02-20 12:50:29,228 main.py:69 INFO: Application listening on port 8000

when I enter my servers ip:8000

I get this _error_:

Error:
2020-02-20 12:50:55,098 web.py:1788 _error_: Uncaught exception GET /login (myip)
HTTPServerRequest(protocol='http', host='serversip:8000', method='GET', uri='/login', version='HTTP/1.1', remote_ip='myip')
Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/tornado/web.py", line 1697, in _execute
result = method(*self.path_args, **self.path_kwargs)
File "/var/www/biriba/html/Source/View/LoginHandler.py", line 17, in get
self.render(data)
File "/var/www/biriba/html/Source/View/BaseHandler.py", line 43, in render
for key, valueType in self.contract.iteritems():
AttributeError: 'dict' object has no attribute 'iteritems'
2020-02-20 12:50:55,104 web.py:2246 _error_: 500 GET /login (myip) 6.96ms

here is the repo :
https://github.com/nikoszn/Biriba-master

I think it doesnt connect to postgres,is that the issue if so how do I fix it? I hope someone can help me