When working with Python classes, it is common to encounter situations where you need to format the class attributes in a specific way. One such scenario is when you want to use the `asdict` function from the `dataclasses` module to convert an instance of a class to a dictionary, and then format the dictionary using the `format` function.

Option 1: Using f-strings

from dataclasses import dataclass, asdict

@dataclass
class Person:
    name: str
    age: int

person = Person("John", 25)
person_dict = asdict(person)
formatted_string = f"Name: {person_dict['name']}, Age: {person_dict['age']}"

print(formatted_string)

In this option, we use f-strings to directly access the values from the dictionary returned by `asdict` and format them into a string. This approach is concise and easy to read, but it requires explicitly mentioning each attribute in the f-string.

Option 2: Using the format method

from dataclasses import dataclass, asdict

@dataclass
class Person:
    name: str
    age: int

person = Person("John", 25)
person_dict = asdict(person)
formatted_string = "Name: {name}, Age: {age}".format(**person_dict)

print(formatted_string)

In this option, we use the `format` method to substitute the placeholders in the string with the values from the dictionary. By using the `**` operator, we unpack the dictionary and pass its key-value pairs as keyword arguments to the `format` method. This approach allows us to define the format string once and reuse it for different instances of the class.

Option 3: Using f-strings with a helper function

from dataclasses import dataclass, asdict

@dataclass
class Person:
    name: str
    age: int

def format_person(person):
    person_dict = asdict(person)
    return f"Name: {person_dict['name']}, Age: {person_dict['age']}"

person = Person("John", 25)
formatted_string = format_person(person)

print(formatted_string)

In this option, we define a helper function `format_person` that takes an instance of the `Person` class as input. Inside the function, we use `asdict` to convert the instance to a dictionary, and then use f-strings to format the dictionary into a string. This approach encapsulates the formatting logic in a separate function, making the code more modular and reusable.

Among the three options, the best choice depends on the specific requirements of your project. Option 1 is suitable for simple cases where you only need to format a few attributes. Option 2 is more flexible and allows you to define the format string once and reuse it. Option 3 is the most modular and reusable, as it encapsulates the formatting logic in a separate function. Consider your project’s needs and choose the option that best fits your use case.