Build a Medical Data Validator - Step 44

Python
1

Tell us what’s happening:

i keep getting the error “You should have a for loop that iterates over invalid_records”

    for invalid_record in invalid_records:
        key = invalid_record[0]
        val = invalid_record[1]
        print(f"Unexpected format '{key}: {val}' at position {index}.")
    is_invalid = True

Your code so far

import re

medical_records = [
    {
        'patient_id': 'P1001',
        'age': 34,
        'gender': 'Female',
        'diagnosis': 'Hypertension',
        'medications': ['Lisinopril'],
        'last_visit_id': 'V2301',
    },
    {
        'patient_id': 'p1002',
        'age': 47,
        'gender': 'male',
        'diagnosis': 'Type 2 Diabetes',
        'medications': ['Metformin', 'Insulin'],
        'last_visit_id': 'v2302',
    },
    {
        'patient_id': 'P1003',
        'age': 29,
        'gender': 'female',
        'diagnosis': 'Asthma',
        'medications': ['Albuterol'],
        'last_visit_id': 'v2303',
    },
    {
        'patient_id': 'p1004',
        'age': 56,
        'gender': 'Male',
        'diagnosis': 'Chronic Back Pain',
        'medications': ['Ibuprofen', 'Physical Therapy'],
        'last_visit_id': 'V2304',
    }
]

def find_invalid_records(
    patient_id, age, gender, diagnosis, medications, last_visit_id
):
    constraints = {
        'patient_id': isinstance(patient_id, str)
        and re.fullmatch('p\d+', patient_id, re.IGNORECASE),
        'age': isinstance(age, int) and age >= 18,
        'gender': isinstance(gender, str) and gender.lower() in ('male', 'female'),
        'diagnosis': isinstance(diagnosis, str) or diagnosis is None,
        'medications': isinstance(medications, list)
        and all([isinstance(i, str) for i in medications]),
        'last_visit_id': isinstance(last_visit_id, str)
        and re.fullmatch('v\d+', last_visit_id, re.IGNORECASE)
    }
    return [key for key, value in constraints.items() if not value]

def validate(data):
    is_sequence = isinstance(data, (list, tuple))

    if not is_sequence:
        print('Invalid format: expected a list or tuple.')
        return False
        
    is_invalid = False
    key_set = set(
        ['patient_id', 'age', 'gender', 'diagnosis', 'medications', 'last_visit_id']
    )

    for index, dictionary in enumerate(data):
        if not isinstance(dictionary, dict):
            print(f'Invalid format: expected a dictionary at position {index}.')
            is_invalid = True
            continue

        if set(dictionary.keys()) != key_set:
            print(
                f'Invalid format: {dictionary} at position {index} has missing and/or invalid keys.'
            )
            is_invalid = True
            continue

        invalid_records = find_invalid_records(**dictionary)

# User Editable Region

    for invalid_record in invalid_records:
        key = invalid_record[0]
        val = invalid_record[1]
        print(f"Unexpected format '{key}: {val}' at position {index}.")
    is_invalid = True

# User Editable Region


    if is_invalid:
        return False
    print('Valid format.')
    return True

validate(medical_records)

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Challenge Information:

Build a Medical Data Validator - Step 44

2

are you sure there are things inside invalid_record?

you should change something in the records object to be invalid, and print what’s inside invalid_records

3

Now i have messed around with this many times,… i’m close but im getting a different error now. I know I’m missing something, but I just don’t get it.

```

for key, val in invalid_records:
            val = dictionary[key]
            print(f"Unexpected format '{key}: {val}' at position {index}.")
        is_invalid = True

```

You should print Unexpected format '<key>: <val>' at position <index>. (where <key>, <val>, and <index> should be replaced by the current key, value and index) inside your for loop.

4

What’s the error?

An error is gold, it has the line number and exactly what’s wrong. Use that information don’t ignore it.

Are you getting val from the first line, or the second line?