- https://stackoverflow.com/questions/62256014/does-python-forbid-two-similarly-looking-unicode-identifiers/62256274#62256274
- https://www.python.org/dev/peps/pep-3131/

{{{python
>>> a = 10
>>> 𝐚 == 𝔞 == 10
True
>>> t = dict()
>>> t['a'] = 10
>>> t['𝐚']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: '𝐚'
}}}