Periodic Fractions with Fraction or float_to_ratio?

[TimeMen]

Hey there,
having little trouble with some numbers.
Wanna convert 205/144 (which is as float: 1.4236111111...) into its fraction 205/144.
This is possible with Fraction or float_to_ratio, like its mentioned here: https://stackoverflow.com/questions/2334...o-fraction
But how can I convert periodic (or partially periodic) numbers in those fractions?
It's really important, that I get 205/144 from 1.42361111111..., because I wanna calculate some Wolstenholme numbers.

Best wishes,
TimeMen

[volcano63]

The link gives the exact recipe - which you are obviously too lazy to try

[TimeMen]

@volcano63
I know about using .limit_denominator(), but how do I have to choose it's argument?
If I use Fraction(1.4236111111111112).limit_denominator(200) I get the right result.
But what if I don't know the argument 200?

[ljmetzger]

Reference: https://docs.python.org/3/library/fractions.html
The default maximum value limit_denominator is 1,000,000. If you want a maximum value of the denominator less than that, you have to arbitrarily guess what you want the maximum denominator to be.

Lewis