from __future__ import division
from scitbx.array_family import flex

def demo():
  # toy array
  a = flex.double([10,11,12])
  # one way of looping over the array
  for i in xrange(a.size()):
    print a[i]
  print
  # a better way of looping over the array
  for ai in a:
    print ai
  print
  # another good way of looping over the array
  for i,ai in enumerate(a):
    print i, ai
  print
  # modify the elements one-by-one
  for i in xrange(a.size()):
    a[i] *= 10
  for ai in a:
    print ai
  print
  # a better way of modifying all elements
  a += 100 # this works at C++ speed
  for ai in a:
    print ai
  print
  print "OK"

if (__name__ == "__main__"):
  demo()