[web2py] problem with type Int

[LightOfMooN]

value=request.vars.myvar

try:
    value = int(value)
except:
    pass

if type(value)==int:
    insert(....)

it rises
<class 'psycopg2.InternalError'>(current transaction is aborted,
commands ignored until end of transaction block)
even if value > 2147483647

But why?
It's so strange, because type(value) must be long.