Python f-string Formatting: A Practical Guide

Python f-string Formatting: A Practical Guide 💡

Since Python 3.6, f-strings have become the standard way to format strings. They are faster, cleaner, and easier to read. Let’s look at some practical examples.

Python f-string formatting icon

✅ Inserting variables

Just wrap variables inside curly braces {} prefixed with an f before the string.

name = "Alice"
age = 25
message = f"My name is {name} and I am {age} years old."
print(message)

✅ Numeric formatting

You can control precision, padding, alignment, and more using format specifiers.

score = 93.4567
print(f"Rounded score: {score:.2f}")  # Rounded score: 93.46

✅ Using expressions and dictionary keys

You can even use expressions and access dictionary elements inside the f-string.

user = {"name": "Bob", "level": "admin"}
print(f"User {user['name']} has {user['level']} access.")

f-strings are not only concise but also more readable and efficient than other formatting methods like % or .format(). Use them by default when working with strings!

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