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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 PositionalEncoding(x, params, **unused_kwargs):
 """Implements bare positional encoding."""

  if not isinstance(x, (list, tuple)):  # non-chunked inputs
    symbol_size = np.shape(x)[1]
    return x + params[:, :symbol_size, :]
  # Chunked case: apply to all chunks selecting as much as needed.
  offset = 0
  results = []
  for chunk in x:
    symbol_size = np.shape(chunk)[1]
    results.append(chunk + params[:, offset:offset + symbol_size, :])
    offset += symbol_size
  return results