hashlib digest() fails typecheck for variable-length digests SHAKE-128 and SHAKE-256 #16480

0 dkg@bob:~/src/test$ cat hashlib-typing.py
#!/usr/bin/python3

import hashlib
h = hashlib.new("SHAKE-128")
h.update(b'')
print(h.hexdigest(16))
print(h.hexdigest())
0 dkg@bob:~/src/test$ mypy --strict hashlib-typing.py
hashlib-typing.py:6: error: Too many arguments for "hexdigest" of "HASH"  [call-arg]
Found 1 error in 1 file (checked 1 source file)
1 dkg@bob:~/src/test$ ./hashlib-typing.py
7f9c2ba4e88f827d616045507605853e
Traceback (most recent call last):
  File "/home/dkg/src/test/./hashlib-typing.py", line 7, in <module>
    print(h.hexdigest())
          ~~~~~~~~~~~^^
TypeError: hexdigest() missing required argument 'length' (pos 1)
1 dkg@bob:~/src/test$