code: def cbpdn_class_label_lookup(label):
      
  
      clsmod = {'admm': admm_cbpdn.ConvBPDN,
                'fista': fista_cbpdn.ConvBPDN}
      if label in clsmod:
          return clsmod[label]
      else:
          raise ValueError('Unknown ConvBPDN solver method %s' % label)
docs: Get a CBPDN class from a label string.