Mirrored and bounded HalfNormal Distribution

Questions
3

Thank you for your kind reply. I tried as you suggested.

import pymc3 as pm
model=pm.Model()

with model:
    BoundedHalfNormal = pm.Bound(pm.Normal, 0., 10.)
    xlat = BoundedHalfNormal('x_lat', 0., 1.)
    x = pm.Deterministic('x', 10. - xlat)
       
with model:
    trace=pm.sample(500)

But getting the error:

  File "<ipython-input-6-3144eb9ad758>", line 6, in <module>
    xlat = BoundedHalfNormal('x_lat', 0., 1.)

  File "C:\Users\CT\AppData\Local\Continuum\anaconda3\lib\site-packages\pymc3\distributions\bound.py", line 219, in __call__
    self.lower, self.upper, *args, **kwargs)

  File "C:\Users\CT\AppData\Local\Continuum\anaconda3\lib\site-packages\pymc3\distributions\distribution.py", line 41, in __new__
    dist = cls.dist(*args, **kwargs)

  File "C:\Users\CT\AppData\Local\Continuum\anaconda3\lib\site-packages\pymc3\distributions\distribution.py", line 52, in dist
    dist.__init__(*args, **kwargs)

  File "C:\Users\CT\AppData\Local\Continuum\anaconda3\lib\site-packages\pymc3\distributions\bound.py", line 155, in __init__
    transform=transform, default=default, *args, **kwargs)

TypeError: __init__() got multiple values for argument 'distribution'