What are some examples of Python f-strings?

What are some examples of Python f-strings?

Python f-strings, or formatted string literals, allow you to embed expressions inside string literals. For example:

name = 'Alice'
age = 30
print(f'My name is {name} and I am {age} years old.')

This will output: My name is Alice and I am 30 years old.

Can you show me more complex examples?

Sure! Here's a more complex example:

import math
radius = 5
area = math.pi * (radius ** 2)
print(f'The area of a circle with radius {radius} is {area:.2f}.')

This will output the area rounded to two decimal places.

What about using f-strings with dictionaries?

Absolutely! You can use f-strings with dictionaries like this:

data = {'name': 'Bob', 'age': 25}
print(f'{data['name']} is {data['age']} years old.')

This will output: Bob is 25 years old.

Are there any performance benefits to using f-strings?

Yes, f-strings are generally faster than other string formatting methods in Python, such as % formatting or str.format(), because they are evaluated at runtime and are more efficient.