Pyarmor get_expired_days

Question

I have a license.lic file generated using pyarmor. But, I dont know the expiry date of the license. Then, I go through the doc, there I get to know to use the from pytransform import get_expired_days.

When I called this fuction get_expired_days(), I got this error

>>> get_expired_days()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "pytransform/__init__.py", line 57, in wrap
    return func(*args, **kwargs)
  File "pytransform/__init__.py", line 124, in get_expired_days
    dlfunc = prototype(('get_expired_days', _pytransform))
AttributeError: 'NoneType' object has no attribute '_handle'

How to read the .lic file and get the expiry date using python?

Thanks