You can already experiment with this.
First, install a few packages
python -m pip install ideas # will also install token-utils
python -m pip install fraction-literal
Next, start your standard Python interpreter and do the following:
>>> from ideas import experimental_syntax_encoding
>>> from ideas import console
>>> console.start()
Configuration values for the console:
transform_source: <function transform_source at 0x00E61FA8>
--------------------------------------------------
Ideas Console version 0.0.19. [Python version: 3.7.8]
~>> from experimental-syntax import fraction_literal
~>> 2/3F
Fraction(2, 3)
~>>