Controlling exponent length in formatted print

Question

Test done with python 3.10

With xx = 1.e-4, I can have a nice print with print ( np.format_float_scientific (xx, precision=0, exp_digits=1, unique=True, trim='-') ). It prints 1e-4, the result I want.

But this is a bunch of code for a rather simple task.

Can I control the length of the exponent with a formatted print ?

print ( f'{xx:3.0e}' ) -> 1e-04

print ( '{:3.0e}'.format(xx) ) -> 1e-04

Is there a way to have only one digit in the exponent ?

Olivier

Answer 1

I'd simply replace the leading zero:

xx = 1.0e-4
print(f"{xx:3.0e}".replace("e-0", "e-"))

Prints:

1e-4