test.py

In [7]: @deprecated_renamed_argument(['x', 'y', 'z'], ['a', 'b', 'c'], '1.2')
   ...: def test(a, b, c):
   ...:     """Test func"""
   ...:     return a, b, c
   ...:
   ...:

In [8]: test?
Signature: test(a, b, c)
Docstring:
Test func

.. versionchanged:: .
   ``b`` replaces the deprecated ``y`` argument.

.. versionchanged:: 1
   ``a`` replaces the deprecated ``x`` argument.

.. versionchanged:: 2
   ``c`` replaces the deprecated ``z`` argument.
File:      ~/dev/astropy/<ipython-input-7-be7dccec6dfa>
Type:      function



In [17]: @deprecated_renamed_argument(['x', 'y', 'z'], 'test', '1.2', arg_in_kwargs=True)
    ...: def test(a, b, c):
    ...:     """Test func"""
    ...:     return a, b, c
    ...:

In [18]: test(x=1, y=2, z=3)
WARNING: AstropyDeprecationWarning: "x" was deprecated in version 1 and will be removed in a future version. Use argument "t" instead. [astropy.utils.decorators]
WARNING: AstropyDeprecationWarning: "y" was deprecated in version . and will be removed in a future version. Use argument "e" instead. [astropy.utils.decorators]
WARNING: AstropyDeprecationWarning: "z" was deprecated in version 2 and will be removed in a future version. Use argument "s" instead. [astropy.utils.decorators]
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-18-36d99f04d144> in <module>()
----> 1 test(x=1, y=2, z=3)

/home/simon/dev/astropy/astropy/utils/decorators.py in wrapper(*args, **kwargs)
    515                         # one with the name of the new argument to the function
    516                         kwargs[new_name[i]] = value
--> 517             return function(*args, **kwargs)
    518
    519         return wrapper

TypeError: test() got an unexpected keyword argument 'e'