code: def groups_norm2(A, n_orient):
      """Compute squared L2 norms of groups inplace."""
      n_positions = A.shape[0] // n_orient
      return np.sum(np.power(A, 2, A).reshape(n_positions, -1), axis=1)
  
imports: import functools
  from math import sqrt
  import numpy
  from ..time_frequency._stft import istft, stft, stft_norm1, stft_norm2
  from ..utils import _check_option, _get_blas_funcs, _validate_type, logger, sum_squared, verbose, warn
  from .mxne_debiasing import compute_bias
label_desc: Use image node_id 2 for calling a global function with example usage: groups_norm2(A, n_orient) and returns: np