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If I have 2 dicts as follows:
d1 = {'a': 2, 'b': 4}
d2 = {'a': 2, 'b': ''}
In order to 'merge' them:
dict(d1.items() + d2.items())
results in
{'a': 2, 'b': ''}
But what should I do if I would like to compare each value of the two dictionaries and only update d2 into d1 if values in d1 are empty/None/''?
When the same key exists, I would like to only maintain the numerical value (either from d1 or d2) instead of the empty value. If both values are empty, then no problems maintaining the empty value. If both have values, then d1-value should stay.
i.e.
d1 = {'a': 2, 'b': 8, 'c': ''}
d2 = {'a': 2, 'b': '', 'c': ''}
should result in
{'a': 2, 'b': 8, 'c': ''}
where 8 is not overwritten by ''.