# !/user/bin/env python

from collections import OrderedDict


def main():
    dict = OrderedDict()

    dict[1] = 'a'
    dict[2] = 'b'
    dict[3] = 'c'

    print(dict)  # OrderedDict([(1, 'a'), (2, 'b'), (3, 'c')])


if __name__ == '__main__':
    main()