A SICP'ish Functional Pairs implemented in Python.
pip install hexlet-pairs>>> from hexlet import pairs
>>> p = pairs.cons(42, 'foo')
>>> pairs.is_pair(p)
True
>>> pairs.car(p)
42
>>> pairs.cdr(p)
'foo'
>>> print(pairs.to_string(p))
cons(42, 'foo')
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