class_docstr: RFC 2104 HMAC class.  Also complies with RFC 4231.
  
  This supports the API for Cryptographic Hash Functions (PEP 247).
code: def _init_hmac(self, key, msg, digestmod):
      self._hmac = _hashopenssl.hmac_new(key, msg, digestmod=digestmod)
      self.digest_size = self._hmac.digest_size
      self.block_size = self._hmac.block_size
  
file_path: catboost/contrib/tools/python3/src/Lib/hmac.py
imports: import warnings
  import hashlib
label_desc: Use image node_id 2 for calling the HMAC obj's underlying member method code with example usage: obj._init_hmac(key, msg, digestmod) without return types