Traceback (most recent call last):

 "app.py", line 27, in <module>
from models import Result

 "/Users/sindhus/Documents/the-real-flask-by-example/models.py", line 1, in <module>
from app import db

 "/Users/sindhus/Documents/the-real-flask-by-example/app.py", line 27, in <module>
from models import ResultImportError: cannot import name 'Result'
Traceback (most recent call last):


 "/Users/vadimborisov/anaconda/lib/python3.5/site-packages/graphviz/backend.py", line 95, in render

subprocess.call(args, startupinfo=STARTUPINFO)


 "/Users/vadimborisov/anaconda/lib/python3.5/subprocess.py", line 557, in call

with Popen(*popenargs, **kwargs) as p:


 "/Users/vadimborisov/anaconda/lib/python3.5/subprocess.py", line 947, in __init__

restore_signals, start_new_session)


 "/Users/vadimborisov/anaconda/lib/python3.5/subprocess.py", line 1551, in _execute_child

raise child_exception_type(errno_num, err_msg)

NotFoundError: [Errno 2] No such file or directory: 'dot'
