Flatten Lab JSON Biomarkers | Dataford Interview Questions

Given a messy JSON payload from a laboratory API, write a Python script to flatten the data and extract specific biomarker values. Implement extract_biomarkers(payload, biomarkers), where payload is a nested dictionary containing dictionaries and lists. A biomarker record contains biomarker or name, plus value or result.value; key matching is case-insensitive. Return a dictionary keyed by the requested names, with lists of values in traversal order. Include every requested key, using an empty list when no value is found.

Constraints

payload is a nested combination of dictionaries, lists, and scalar JSON values
Each biomarker record uses a string in biomarker or name
A record stores its value in value or result.value
1 <= len(biomarkers) <= 100
Biomarker names are matched case-insensitively after trimming surrounding whitespace
Return values in depth-first traversal order

Function Signature

def extract_biomarkers(payload, biomarkers):

Your question is Flatten Lab JSON Biomarkers. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

payload is a nested combination of dictionaries, lists, and scalar JSON values
Each biomarker record uses a string in biomarker or name
A record stores its value in value or result.value
1 <= len(biomarkers) <= 100
Biomarker names are matched case-insensitively after trimming surrounding whitespace
Return values in depth-first traversal order

Function Signature

def extract_biomarkers(payload, biomarkers):

Your question is Flatten Lab JSON Biomarkers. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.