Python string Method - format_map()

The format_map() method is a built-in Python string method that returns a formatted version of the string using a mapping (dictionary) to fill in the placeholders.

The method takes a single argument, a dictionary or a mapping object, that contains key-value pairs that correspond to the placeholders in the string.

Here's an example that demonstrates the usage of the format_map() method:

person = {'name': 'Alice', 'age': 30}

greeting = 'Hello, {name}! You are {age} years old.'.format_map(person)

print(greeting)  # Output: Hello, Alice! You are 30 years old.

In this example, we create a dictionary person that contains the name and age of a person. We then create a string greeting that contains two placeholders {name} and {age}. Finally, we call the format_map() method on the string and pass it the person dictionary. The method replaces the placeholders with the corresponding values from the dictionary and returns the formatted string.

One advantage of using the format_map() method over the format() method is that you can use a dictionary to specify the values for the placeholders, rather than having to pass the values as separate arguments to the format() method.