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Showing content from http://docs.python.org/lib/../c-api/../tutorial/../tutorial/../tutorial/../c-api/hash.html below:

PyHash API — Python 3.13.5 documentation

See also the PyTypeObject.tp_hash member and Hashing of numeric types.

type Py_hash_t¶

Hash value type: signed integer.

Added in version 3.2.

type Py_uhash_t¶

Hash value type: unsigned integer.

Added in version 3.2.

PyHASH_MODULUS¶

The Mersenne prime P = 2**n -1, used for numeric hash scheme.

Added in version 3.13.

PyHASH_BITS¶

The exponent n of P in PyHASH_MODULUS.

Added in version 3.13.

PyHASH_MULTIPLIER¶

Prime multiplier used in string and various other hashes.

Added in version 3.13.

PyHASH_INF¶

The hash value returned for a positive infinity.

Added in version 3.13.

PyHASH_IMAG¶

The multiplier used for the imaginary part of a complex number.

Added in version 3.13.

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.

Added in version 3.4.

PyHash_FuncDef *PyHash_GetFuncDef(void)¶

Get the hash function definition.

See also

PEP 456 “Secure and interchangeable hash algorithm”.

Added in version 3.4.

Py_hash_t Py_HashPointer(const void *ptr)¶

Hash a pointer value: process the pointer value as an integer (cast it to uintptr_t internally). The pointer is not dereferenced.

The function cannot fail: it cannot return -1.

Added in version 3.13.

Py_hash_t PyObject_GenericHash(PyObject *obj)¶

Generic hashing function that is meant to be put into a type object’s tp_hash slot. Its result only depends on the object’s identity.

CPython implementation detail: In CPython, it is equivalent to Py_HashPointer().

Added in version 3.13.

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