`traitlets.traitlets:HasTraits.trait_has_value`

source: /traitlets/traitlets.py :1828

Signature

def trait_has_value ( self , name : str ) → bool

Summary

Returns True if the specified trait has a value.

Extended Summary

This will return false even if getattr would return a dynamically generated default value. These default values will be recognized as existing only after they have been generated.

Example

class MyClass(HasTraits):
    i = Int()

mc = MyClass()
assert not mc.trait_has_value("i")
mc.i  # generates a default value
assert mc.trait_has_value("i")

Aliases

traitlets.HasTraits.trait_has_value