Equals signs are now allowed inside f-strings starting with Python 3.8. This lets you quickly evaluate an expression while outputting the expression that was evaluated. It's very handy for debugging. For example:
x = 3
print(f'{x*9 + 15=}')
When evaluated, this prints:
x*9 + 15=42
By using something like print(f'{myvar=}')
, you can save time during
debugging.