Dynamic Allocation of Nested Dictionaries

[Mekire]

Still think the exec is ugly and bad.

I think this is pretty clean way to set from a list:

from collections import defaultdict
 

def DynamicNestedDict():
    return defaultdict(DynamicNestedDict)


def try_dynamic_nested_dict():
    keylist = ['bind', 'application level', 'binding']
    loc = [20, 96, 100, 101, 102, 104, 105, 115, 193, 434, 546]
 
    dd = DynamicNestedDict()

    level = dd
    for key in keylist[:-1]:
        level = level[key]
    level[keylist[-1]] = loc
 
    print("dd['bind']['application level']['binding']: {}"
          .format(dd['bind']['application level']['binding']))
 
 
if __name__ == '__main__':
    try_dynamic_nested_dict()

Edit:
And for a possibly more convenient API:

from collections import defaultdict

 
class DynamicNestedDict(defaultdict):
    def __init__(self, *args, **kwargs):
        super(DynamicNestedDict, self).__init__(DynamicNestedDict, *args, **kwargs)

    def set_from_list(self, keylist, value):
        level = self
        for key in keylist[:-1]:
            level = level[key]
        level[keylist[-1]] = value

    def get_from_list(self, keylist):
        level = self
        for key in keylist[:-1]:
            level = level[key]
        return level[keylist[-1]]


def try_dynamic_nested_dict():
    keylist = ['bind', 'application level', 'binding']
    loc = [20, 96, 100, 101, 102, 104, 105, 115, 193, 434, 546]
    dd = DynamicNestedDict()
    dd.set_from_list(keylist, loc)
    result = dd.get_from_list(keylist)
    print("dd['bind']['application level']['binding']: {}".format(result))


if __name__ == '__main__':
    try_dynamic_nested_dict()

Testing certainly needed.