how to write a numpy array to a file in python

1numpy.savetxt(fname, X, fmt='%.18e', delimiter=' ', newline='\n', 
2              header='', footer='', comments='# ', encoding=None)
3
4
5x = y = z = np.arange(0.0,5.0,1.0)
6np.savetxt('test.out', x, delimiter=',')   # X is an array
7np.savetxt('test.out', (x,y,z))   # x,y,z equal sized 1D arrays
8np.savetxt('test.out', x, fmt='%1.4e')   # use exponential notation