
    In a hospital's patient monitoring system, given a list of patient records where each record contains a patient ID and their readmission risk score, identify the ID of the patient with the lowest risk of readmission. Each record is represented as a tuple where the first element is the patient ID and the second element is their calculated risk score between 0 and 1.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    In a hospital's patient monitoring system, given a list of patient records where each record contains a patient ID and their readmission risk score, identify the ID of the patient with the lowest risk of readmission. Each record is represented as a tuple where the first element is the patient ID and the second element is their calculated risk score between 0 and 1.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    In a hospital's patient monitoring system, given a list of patient records where each record contains a patient ID and their readmission risk score, identify the ID of the patient with the lowest risk of readmission. Each record is represented as a tuple where the first element is the patient ID and the second element is their calculated risk score between 0 and 1.
    

    """
    res = min(test_list, key=itemgetter(1))[0]
    return res