PyHash API
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See also the "PyTypeObject.tp_hash" member.

type Py_hash_t

   Hash value type: signed integer.

   在 3.2 版新加入.

type Py_uhash_t

   Hash value type: unsigned integer.

   在 3.2 版新加入.

type PyHash_FuncDef

   Hash function definition used by "PyHash_GetFuncDef()".

   const char *name

      Hash function name (UTF-8 encoded string).

   const int hash_bits

      Internal size of the hash value in bits.

   const int seed_bits

      Size of seed input in bits.

   在 3.4 版新加入.

PyHash_FuncDef *PyHash_GetFuncDef(void)

   Get the hash function definition.

   也參考: **PEP 456** "Secure and interchangeable hash algorithm".

   在 3.4 版新加入.
