content: *** 控制NumPy底层库创建的线程数量
  
  from os import environ
  
  N_THREADS = "4"
  environ["OMP_NUM_THREADS"] = N_THREADS
  environ["OPENBLAS_NUM_THREADS"] = N_THREADS
  environ["MKL_NUM_THREADS"] = N_THREADS
  environ["VECLIB_MAXIMUM_THREADS"] = N_THREADS
  environ["NUMEXPR_NUM_THREADS"] = N_THREADS
  
  import numpy as np
  
  import pdb
  
  pdb.set_trace()
  x = np.zeros((1024, 1024))
  
  
  *** print
  
  
  
  *** 存储
  
  npy格式存tensor
  
  简单方式也可 file.write(tensor.detach().numpy().astype("float32").tobytes())