What are Python f-strings and how do I use them?

What are Python f-strings and how do I use them?

Python f-strings, introduced in Python 3.6, allow you to embed expressions inside string literals using curly braces. You can create formatted strings easily by prefixing the string with an 'f' or 'F'. For example: name = 'Alice'; greeting = f'Hello, {name}!'.

Can you give me more examples of using f-strings?

Sure! Here are a few examples:

1. age = 30; print(f'I am {age} years old.')
2. pi = 3.14159; print(f'Pi rounded to two decimal places is {pi:.2f}.')
3. value = 42; print(f'The value is {value:0>3}.') (This pads the number with zeros).

What are the advantages of using f-strings over other formatting methods?

F-strings are more readable and concise compared to older methods like % formatting or str.format(). They also allow for inline expressions, making it easier to include calculations or function calls directly within the string.

Are there any limitations to using f-strings?

Yes, f-strings can only be used in Python 3.6 and later. Additionally, they cannot be used with expressions that are not valid Python syntax inside the curly braces.