Lodash Get Deep Access | Dataford Interview Questions

Binance frontend configuration often contains deeply nested dictionaries and arrays, such as spot trading preferences or Binance Pay UI settings. Implement a Python function that retrieves a nested value using a lodash.get-style path without raising an exception when a path is missing.

Formal Specification

Implement get_value(obj, path, default_value).

obj is a nested Python dictionary or list.
path is either a dot and bracket string, such as "user.preferences[0].theme", or a list of path segments, such as ["user", "preferences", 0, "theme"].
Dot notation accesses dictionary keys.
Bracket notation supports nonnegative integer list indexes and quoted dictionary keys, such as ["display.name"].
Return the value at the path if every segment exists.
Return default_value only when the path cannot be resolved. An existing value of None must be returned as None.
Do not mutate obj.

Constraints

obj contains at most 10^4 nested containers or values.
The path contains at most 100 segments.
Valid paths use dot notation, integer brackets, or quoted bracket keys.
Dictionary keys and path segments are strings or nonnegative integers.
The input path is non-empty and syntactically valid.

Function Signature

def get_value(obj, path, default_value):

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