Appending to file using savetxt

Question

I\'m trying to append array b and c to file.txt. The default behavior is to overwrite and I cant find any documentation on changing this.

import numpy as np
         


        

Answer 1

Use open() with the 'append' mode, and pass the stream to the savetxt method:

with open("test.txt", "ab") as f:
    numpy.savetxt(f, a)

Edit: To add a new line, or whatever:

with open("test.txt", "ab") as f:
    f.write(b"\n")
    numpy.savetxt(f, a)