Numpy data access library 04 _

import numpy as np

nparr1=np.arange(0,20).reshape(4,5)

print(nparr1)

#存储 np.savetxt("nparr1.csv",nparr1,fmt="%d",delimiter=",")

# np.savetxt("nparr2.csv",nparr1,fmt="%s")

# Saved into the same directory

# Read

nparr2=np.loadtxt("nparr1.csv",delimiter=",")

print(nparr2.astype("int64"))