code: def time_numpy_linalg_lstsq_a__b_float64(self):
      np.linalg.lstsq(self.a, self.b, rcond=-1)
  
imports: from .common import Benchmark, get_squares_, get_indexes_rand, TYPES1
  import numpy
label_desc: Use image node_id 2 for calling the Lstsq obj's underlying member method code with example usage: obj.time_numpy_linalg_lstsq_a__b_float64() without return types