Formatting floats in Python f-strings: The .nf specifier

Want to display a Python float with a limited number of decimals?

Use .nf as an f-string’s format specifier. n is the number of digits to show after the decimal:

x = 123.45678 
print(f'{x:.2f}')  # 123.46
print(f'{x:.3f}')  # 123.457

Note: It rounds the final digit!