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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 _fill_and_verify_padding(padding, n):
 """Verifies that the provided padding is supported and expands to size n. Args: padding: One of ALLOWED_PADDINGS, or an iterable of them. n: An integer, the size of the desired output list. Returns: If `padding` is one of ALLOWED_PADDINGS, a tuple of size `n` containing `n` copies of `padding`. If `padding` is an iterable of ALLOWED_PADDINGS of size `n`, it returns `padding(x)`. Raises: TypeError: If n is not a positive integer; if padding is neither one of ALLOWED_PADDINGS nor an iterable of ALLOWED_PADDINGS of size n. """

  if not isinstance(n, numbers.Integral) or n < 1:
    raise TypeError("n must be a positive integer")

  if isinstance(padding, six.string_types) and padding in ALLOWED_PADDINGS:
    return (padding,) * n

  try:
    if len(padding) == n and all(p in ALLOWED_PADDINGS for p in padding):
      return tuple(padding)
  except TypeError:
    pass

  raise TypeError("padding is {}, must be member of '{}' or an iterable of "
                  "these of size {}".format(padding, ALLOWED_PADDINGS, n))