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REST API: Patient’s Medical Record

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A REST API contains patients’ medical records. Given a patient id, fetch all the records for the patient and return their average body temperature. The API supports pagination and all pages for a patient must be analyzed.

To access the medical information, perform an HTTP GET request to:

https://jsonmock.hackerrank.com/api/medical_records?userId=<userId>&page=<page>

where <userId> is the patient id and <page> is the page number to fetch.

For example, a GET request to

https://jsonmock.hackerrank.com/api/medical_records?userId=3&page=3

returns the third page of data for userId 3.

Similarly, a GET request to

https://jsonmock.hackerrank.com/api/medical_records?userId=3&page=1

returns the first page of data for userId 3.

The response is a JSON with the following 5 fields:

  • page: the current page of the results
  • per_page: the maximum number of results returned per page
  • total: the total number of results
  • total_pages: the total number of pages with results
  • data: Either an empty array or an array of medical records as JSON objects. Each medical record object has multiple properties but below are needed for this question:
    • userId: user id for which we have queried
    • vitals.bodyTemperature: user’s body temperature for this particular record

 

Below is an example of a medical record:

{
    id: 11,
    timestamp: 1563846626267,
    diagnosis: {
        id: 2,
        name: "Common Cold",
        severity: 1
    },
    vitals: {
        bloodPressureDiastole: 126,
        bloodPressureSystole: 75,
        pulse: 99,
        breathingRate: 22,
        bodyTemperature: 101.9
    },
    userId: 3,
    userName: "Helena Fernandez",
    userDob: "23-12-1987",
    ...
},

 

Function Description

Complete the function getAverageTemperatureForUser in the editor below. Use the property ‘vitals.bodyTemperature’ for each record to calculate the average.

getAverageTemperatureForUser has a single parameter:

    int userId: the patient id to query

Returns

  • If the data array of the response does not contain any medical records, return the string “0”.
  • If the data array of the response contains medical records, return the patient’s average bodyTemperature as a string with 1 decimal place.
Input Format For Custom Testing

In the first and only line, there is a user id.

Sample Case 0

Sample Input For Custom Testing

1

Sample Output

100.7

Explanation

Given userId as 1, we fetch all medical records for this user by making api calls to https://jsonmock.hackerrank.com/api/medical_records?userId=1&page=1, https://jsonmock.hackerrank.com/api/medical_records?userId=1&page=2 and https://jsonmock.hackerrank.com/api/medical_records?userId=1&page=3 as there are 28 records on 3 pages. For reach record retrieved, we use property ‘vitals.bodyTemperature’ and calculate the average for 28 records and return the average value ‘100.7’.

Sample Case 1

Sample Input For Custom Testing

10

Sample Output

0

Explanation

Given userId as 10, we make an api call to https://jsonmock.hackerrank.com/api/medical_records?userId=10&page=1. The response returns data as an empty array and total as 0. Hence the function returns ‘0’.

Solution (Python3)

				
					#!/bin/python3

import math
import os
import random
import re
import sys
import requests

def getAverageTemperatureForUser(userId):
    # Initialize variables
    page = 1
    total_pages = 1
    total_records = 0
    sum_temperature = 0

    # Fetch all pages for the given patient ID
    while page <= total_pages:
        url = f"https://jsonmock.hackerrank.com/api/medical_records?userId={userId}&page={page}"
        response = requests.get(url)
        data = response.json()

        # Get the total number of records and pages
        total_records = data['total']
        total_pages = data['total_pages']

        # Process each record and calculate the sum of body temperatures
        for record in data['data']:
            sum_temperature += record['vitals']['bodyTemperature']

        page += 1

    # Calculate the average body temperature
    if total_records > 0:
        average_temperature = sum_temperature / total_records
        return "{:.1f}".format(average_temperature)
    else:
        return "0"

userId = 1  # Provide the user ID here
result = getAverageTemperatureForUser(userId)
print(result)

if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    userId = int(input().strip())

    result = getAverageTemperatureForUser(userId)

    fptr.write(result + '\n')

    fptr.close()
Tags certificationcertifyhackerrankrestsoftware engineer

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