import numpy as np
a = np.array([9, 0, 3, 8, 1, 0, 0, 0])
def key(a):
return a != 0
print(a[np.argsort(key(a))])
aW1wb3J0IG51bXB5IGFzIG5wCgphID0gbnAuYXJyYXkoWzksIDAsIDMsIDgsIDEsIDAsIDAsIDBdKQoKZGVmIGtleShhKToKCXJldHVybiBhICE9IDAKCgpwcmludChhW25wLmFyZ3NvcnQoa2V5KGEpKV0pCg==