Nested Dictionaries

Use case: When we are querying from an API, the JSONs can be very nested and can get messy. Here's what I mean:

json["field"]["field1"]["field2"] # Messy!

# What about this instead?
json.field.field1.field2 # Not messy :)

Example:

# pip install attrdict
from attrdict import AttrDict

# json: dict
json = AttrDict(json)
json.field.field1.field2 # possible now

Extension:

We can use a dataclass like so to make this even cleaner.

from dataclasses import dataclass
from dataclasses import field
import operator

from attrdict import AttrDict


@dataclass
class ExampleClass:
    a: str = field(metadata={"api_key": "field1"})
    b: str = field(metadata={"api_key": "field1.field2.field3"})


json = request.get(...).json()
json = AttrDict(json)

for field in fields(ExampleClass):
    api_key = field.metadata["api_key"]

    # Can do this:
    api_value = operator.attrgetter(api_key)(json)
    # OR this:
    api_value = eval(f"json.{api_key}")

    # Both of these probably need try-excepts for AttributeError