import numpy

a = numpy.random.default_rng().integers(1, 50, 30)
print(a)

numpy.save('file', a)
numpy.savetxt('file.csv', a)
#numpy.savetxt('file.csv', a, fmt='%d')

b = numpy.load('file.npy')
c = numpy.loadtxt('file.csv')
#c = numpy.loadtxt('file.csv', dtype='int64')
print(b)
print(c)