Does Mathematica have an equivalent of Python's float.as_integer_ratio?

SetPrecision[] does this:

SetPrecision[0.1, ∞]
   3602879701896397/36028797018963968

Not as clean as J.M.'s method but this seems to give the same result:

 0.1 ~RealDigits~ 2 ~FromDigits~ 2

3602879701896397/36028797018963968

Follow with Numerator and Denominator if needed.