To make fraction literals more readable, this should be made to work:Fraction('31_415_925_535 / 10_000_000_000')

PEP 515 – Underscores in Numeric Literals are well supported in all numeric types except for fractions. This works:1_234 andDecimal('1_234'). However, this is not accepted:Fraction('1_234').

Like decimals and ints, fractions support leading and trailing whitespace for string inputs:int(' 123 '),Decimal(' 123.4 '), andFraction(' 123/100 '). What is still needed is support for optional whitespace around the forward slash:Fraction('355 / 113'). This particular example came up when using the Fraction module to teach math to kids and where the string literal was obtained from callinginput().

Side note: If you writeprint(355/113) in your code, Black will reformat it toprint(355 / 113). Because of this, I expect that adults will also develop a preference for writing fractions with whitespace around the slash.