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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_package_data():
 """Iterate over the `init` dir for directories and returns all files within them. Only files within `binaries` and `templates` will be added. """

    from os import listdir as ls
    from os.path import join as jn

    x = 'init'
    b = jn('serv', x)
    dr = ['binaries', 'templates']
    return [jn(x, d, f) for d in ls(b) if d in dr for f in ls(jn(b, d))]