Traits是开源扩展库，Traits本身与科学计算可视化没有直接关联，但他其实TVTK，Mayavi，TraitsUI基础

pip3 install traits-4.6.-cp36-cp36m-win_amd64.whl
pip3 install traits

from traits.api import HasTraits    进行测试

traits属性可以像类的属性来定义，但是要像实例的属性来使用

>>> from traits.api import HasTraits

>>> from traits.api import HasTraits,Color

>>>

>>> class Circle(HasTraits):

...     color = Color　　#traits属性可以像类的属性来定义，但是要像实例的属性来使用

...

>>> c = Circle()

>>> Circle.color　　　　#不是类的属性

Traceback (most recent call last):

  File "<stdin>", line , in <module>

AttributeError: type object 'Circle' has no attribute 'color'

>>> c.color　　　　　　　#是实例的属性

<PyQt4.QtGui.QColor object at 0x000000000AAA74A8>

>>> c.color = 'red'

>>> c.color.getRgb()

(, , , )

>>> c.color = 'abc'　　#按照严格的类型来区别变量，并且会给出明确的错误信息和使用提示

Traceback (most recent call last):

  File "<stdin>", line , in <module>

  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-p

ackages\traits\trait_handlers.py", line 173, in error

    value )

traits.trait_errors.TraitError: The 'color' trait of a Circle instance must be a

 string of the form (r,g,b) or (r,g,b,a) where r, g, b, and a are integers from

 to , a QColor instance, a Qt.GlobalColor, an integer which in hex is of the

 form 0xRRGGBB, a string of the form #RGB, #RRGGBB, #RRRGGGBBB or #RRRRGGGGBBBB

or 'aliceblue' or 'antiquewhite' or 'aqua' or 'aquamarine' or 'azure' or 'beige'

 or 'bisque' or 'black' or 'blanchedalmond' or 'blue' or 'blueviolet' or 'brown'

.............

>>> c.configure_traits()　　#出现配置属性框，供我们选择颜色

>>> c.configure_traits()

True　　#选择颜色后返回True

>>> c.color

<PyQt4.QtGui.QColor object at 0x000000000EA74D68>　　#现在返回的颜色与我们选择的一致