FWIW, bigfloat (GNU MPFR) has arbitrary precision and rounding that can be set with `with` context managers: <a href="https://pythonhosted.org/bigfloat/">https://pythonhosted.org/bigfloat/</a><br><br>On Thursday, November 14, 2019, Greg Ewing &lt;<a href="mailto:greg.ewing@canterbury.ac.nz">greg.ewing@canterbury.ac.nz</a>&gt; wrote:<br>&gt; On 15/11/19 7:39 am, Chris Angelico wrote:<br>&gt;&gt;<br>&gt;&gt; But in your<br>&gt;&gt; source code, if you type 4.1, you are asking for the floating-point<br>&gt;&gt; value<br>&gt;<br>&gt; The idea of providing decimal literals comes up from time to<br>&gt; time, but so far it hasn&#39;t gotten anywhere. The problem is that<br>&gt; it would make the core interpreter dependent on the Decimal<br>&gt; module.<br>&gt;<br>&gt; --<br>&gt; Greg<br>&gt; _______________________________________________<br>&gt; Python-ideas mailing list -- <a href="mailto:python-ideas@python.org">python-ideas@python.org</a><br>&gt; To unsubscribe send an email to <a href="mailto:python-ideas-leave@python.org">python-ideas-leave@python.org</a><br>&gt; <a href="https://mail.python.org/mailman3/lists/python-ideas.python.org/">https://mail.python.org/mailman3/lists/python-ideas.python.org/</a><br>&gt; Message archived at <a href="https://mail.python.org/archives/list/python-ideas@python.org/message/4PYR7MP47ZFQXMPIN5AWTDHMQO5W2UK6/">https://mail.python.org/archives/list/python-ideas@python.org/message/4PYR7MP47ZFQXMPIN5AWTDHMQO5W2UK6/</a><br>&gt; Code of Conduct: <a href="http://python.org/psf/codeofconduct/">http://python.org/psf/codeofconduct/</a><br>&gt;