Inverse of pandas json_normalize or json_denormalize – python pandas

pandas.py

# more at https://stackfame.com/inverse-of-pandas-json_normalize-or-json_denormalize-python-pandas

def make_formatted_dict(my_dict, key_arr, val):
    """
    Set val at path in my_dict defined by the string (or serializable object) array key_arr
    """
    current = my_dict
    for i in range(len(key_arr)):
        key = key_arr
        if key not in current:
            if i == len(key_arr)-1:
                current = val
            else:
                current = {}
        else:
            if type(current) is not dict:
                print("Given dictionary is not compatible with key structure requested")
                raise ValueError("Dictionary key already occupied")
        current = current
    return my_dict
def df_to_formatted_json(df, sep="."):
    result = []
    for _, row in df.iterrows():
        parsed_row = {}
        for idx, val in row.iteritems():
            keys = idx.split(sep)
            parsed_row = make_formatted_dict(parsed_row, keys, val)
        result.append(parsed_row)
    return result

pandas.Series.iteritems() method on line 25 is now deprecated. (See official pandas documentation)
You can use pandas.Series.items() instead ;)
Thanks for the code!