How can I split a string and form a multi-level nested dictionary?

Question

I have a string like

foo/bar/baz

I also have val=1 for example. Is there a clean way to split the foo/bar/baz int

Answer 1

d = 1
for part in reversed(s.split('/')):
    d = {part: d}

If this needs to be extended to create something like a directory tree, you might want a solution based on defaultdict:

import collections

def tree():
    return collections.defaultdict(tree)

def parsetree(path_strings):
    t = tree()
    for s in path_strings:
        temp = t
        parts = s.split('/')
        for part in parts[:-1]:
            temp = temp[part]
        temp[parts[-1]] = 1
    return t

Demo:

>>> t = parsetree([
...     'foo/bar/baz',
...     'foo/bar/bop',
...     'foo/spam'
... ])
>>> t['foo']['bar']['baz']
1
>>> t['foo']['spam']
1