testing.py

Python 2.7.12 (default, Dec  4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from trafaret_validator import TrafaretValidator
>>> import trafaret as t
>>> class T1(TrafaretValidator):
...     id = t.Int()
... 
>>> x = T1(id=1)
>>> x.test = 1
>>> x
<TrafaretValidator is-data-valid=True data={'id': 1} errors={}>
>>> x.test = t.Int()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "trafaret_validator/validator.py", line 59, in __setattr__
    self._trafaret = t.Dict(self._validators)
  File "trafaret_validator/validator.py", line 59, in __setattr__
    self._trafaret = t.Dict(self._validators)
  File "trafaret_validator/validator.py", line 54, in __setattr__
    raise AttributeError('Cannot reassign validator.')
AttributeError: Cannot reassign validator.
>>> x\
... 
KeyboardInterrupt
>>> x
<TrafaretValidator is-data-valid=True data={'id': 1} errors={}>
>>> T1
<T1 trafaret=<Dict(<Key "id" <Int>>)>>
>>> T1._validators
{'test': <Int>, 'id': <Int>, '_trafaret': <Dict(<Key "id" <Int>>, <Key "test" <Int>>)>}