extract_key_value_pairs.py

def extract_key_value_pairs(input_str, keys):
    """
    # Example:

    result = extract_key_value_pairs(
        input_str="Postcode: NG11 Radius: 5 Price range: 450000-500000 Number of bedrooms: 2",
        keys=["Postcode", "Radius", "Price range", "Number of bedrooms"]
    )

    >>> result
    {'Number of bedrooms': '2', 'Radius': '5', 'Postcode': 'NG11', 'Price range': '450000-500000'}

    """
    data = {}

    for k in keys:
        value = ""
        char_index = input_str.find(k) + len(k) + 2

        while True:
            try:
                char = input_str[char_index]
            except IndexError:
                break

            if char == " ":
                break

            value += char
            char_index += 1

        data[k] = value

    return data


result = extract_key_value_pairs(
    input_str="Postcode: NG11 Radius: 5 Price range: 450000-500000 Number of bedrooms: 2",
    keys=["Postcode", "Radius", "Price range", "Number of bedrooms"]
)

print(result)