How to catch exeption output in flask?

Question

Flask

All greetings
Prompt please, solution of a situation:
In a DB (sqllite) two fields are unique. When adding a "duplicate" value to the database via webcam, an exeption
(IntegrityError) UNIQUE constraint failed: nnn.n_id u'INSERT INTO nnn (o_name, n_name, n_id) VALUES (?, ?, ?)' (u'one', u 'one1', u'uno1')
(that is, there is already such a value for the n_id field).
You need to use flash to display the name of the field in the webcam, which is unique (out of 6 of them in the database, 2).
I'm trying the option through parsing sys.exc_info (), but is there a better option? for example exeptions of integretyerror contain arguments, where is the name of the unique field written?
Thanks

Answer 1

class IntegrityError(DatabaseError):
    """Wraps a DB-API IntegrityError."""

class DatabaseError(DBAPIError):
    """Wraps a DB-API DatabaseError."""

https://github.com/zzzeek/sqlalchemy/blob/7393ee8d...
from line 253
Well, then something like this.

try:
    f = open('myfile.txt')
    s = f.readline()
    i = int(s.strip())
except IOError as e:
    print "I/O error({0}): {1}".format(e.errno, e.strerror)

And for God's sake, I spent more time trying to read the question, fu be like that