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@charlieparkes
Created September 13, 2018 17:00
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Python Dict Tools
def update_nested(d, keys, val):
"""Updates a nested dictionary value.
Args:
dictionary (dict): The dict we'll be updating
keys (list): A set of keys pointing to a subvalue of a dict e.g. ['a', 'b'] -> dict['a']['b']
val: A new value to set at dictionary[key1][key2][..]
Returns:
dict: Updated dictionary
"""
current = d
for key in keys[:-1]:
current = current.setdefault(key, {})
current[keys[-1]] = val
return d
def set_nested_path(d, path, val):
keys = path.split(‘.’)
return set_nested(d, keys, val)
def get_nested(d, keys):
"""Given a dictionary, fetch a key nested several levels deep."""
head = d
for k in keys:
head = head.get(k, {})
if not head:
return head
return head
def get_nested_path(d, path):
keys = path.split(‘.’)
return get_nested(d, keys)
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