Create a nested dict from a dotted-key dict

nestedkeys.py

def rejigger(src):

    dst = {} # dict to hold new structure

    # iterate over keys and values in source dict
    for key, value in src.iteritems():
        set_value(dst, key.split('.'), value)

    return dst

def set_value(d, attrs, value):

    first_attr = attrs[0] # grab first dotted attribute

    if len(attrs) == 1:

        # if only attribute, set it on the dict
        d[first_attr] = value

    else:

        if first_attr not in d:
            d[first_attr] = {}

        set_value(d[first_attr], attrs[1:], value)

if __name__ == '__main__':

    data = {
        'a.b.c': 1,
        'd': 2,
        'a.b.x': 3,
    }

    print data
    print rejigger(data)