How would I flatten a nested dictionary in Python 3? -

this question has answer here:

• flatten nested python dictionaries, compressing keys 15 answers

is there native function flatten nested dictionary output dictionary keys , values in format:

_dict2 = {   'this.is.an.example': 2,   'this.is.another.value': 4,   'this.example.too': 3,   'example': 'fish' } 

assuming dictionary have several different value types, how should go iterating dictionary?

you want traverse dictionary, building current key , accumulating flat dictionary. example:

def flatten(current, key, result):     if isinstance(current, dict):         k in current:             new_key = "{0}.{1}".format(key, k) if len(key) > 0 else k             flatten(current[k], new_key, result)     else:         result[key] = current     return result  result = flatten(my_dict, '', {}) 

using it:

print(flatten(_dict1, '', {}))  {'this.example.too': 3, 'example': 'fish', 'this.is.another.value': 4, 'this.is.an.example': 2}