code: def _fprime_ieqcons(x_full, k_params):
      """
      Derivative of the inequality constraints
      """
      I = np.eye(k_params)  # noqa:E741
      A = np.concatenate((I, I), axis=1)
      B = np.concatenate((-I, I), axis=1)
      C = np.concatenate((A, B), axis=0)
      ## Return
      return C
  
file_path: statsmodels/statsmodels/base/l1_slsqp.py
imports: import numpy
  from scipy.optimize import fmin_slsqp
  import statsmodels.base.l1_solvers_common
label_desc: Use image node_id 6 for calling a global function with example usage: _fprime_ieqcons(x_full, k_params) and returns: C