Set order of keys in JSON - OrderedDict

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examples/dictionary/set_order.py

from collections import OrderedDict

d = {}
d['a'] = 1
d['b'] = 2
d['c'] = 3
d['d'] = 4
print(d)

planned_order = ('b', 'c', 'd', 'a')
e = OrderedDict(sorted(d.items(), key=lambda x: planned_order.index(x[0])))
print(e)

print('-----')
# Create index to value mapping dictionary from a list of values
planned_order = ('b', 'c', 'd', 'a')
plan = dict(zip(planned_order, range(len(planned_order))))
print(plan)

f = OrderedDict(sorted(d.items(), key=lambda x: plan[x[0]]))
print(f)

{'a': 1, 'b': 2, 'c': 3, 'd': 4}
OrderedDict([('b', 2), ('c', 3), ('d', 4), ('a', 1)])
-----
{'b': 0, 'c': 1, 'd': 2, 'a': 3}
OrderedDict([('b', 2), ('c', 3), ('d', 4), ('a', 1)])