python - Generate a pandas dataframe from ordereddict?

Question

I am trying to create a pandas dataframe from an ordereddict to preserve the order of the values. But for some reason after creating the dataframe the fields are messed up again.

Here's the list of ordereddicts:

[OrderedDict([
  ('key_a',
  'value_a'),
  ('key_b',
  'value_b'),
]),
OrderedDict([
  ('key_a',
  'value_c'),
  ('key_b',
  'value_d'),
])
]

Now how should I create a pandas DataFrame from these? What I am looking for is something like that (the important thing is the key_a and key_b etc column name order):

  key_a    key_b
0 value_a  value_b
1 value_c  value_d

I have tried:

pd.DataFrame.from_records(orderedDictList)
pd.DataFrame.from_dict(orderedDictList)

Feel free to ask any additional questions.

Answer 1

Following this answer, you need to explicitly specify your column order:

df = pd.DataFrame(orderedDictList, columns=orderedDictList.keys())

Of course, first you need to ensure that you have an ordered dictionary.