PyHash API¶
See also the PyTypeObject.tp_hash member and Hashing of numeric types.
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type Py_hash_t¶
Hash value type: signed integer.
Added in version 3.2.
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type Py_uhash_t¶
Hash value type: unsigned integer.
Added in version 3.2.
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PyHASH_MODULUS¶
The Mersenne prime
P = 2**n -1, used for numeric hash scheme.Added in version 3.13.
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PyHASH_BITS¶
The exponent
nofPinPyHASH_MODULUS.Added in version 3.13.
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PyHASH_MULTIPLIER¶
Prime multiplier used in string and various other hashes.
Added in version 3.13.
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PyHASH_INF¶
The hash value returned for a positive infinity.
Added in version 3.13.
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PyHASH_IMAG¶
The multiplier used for the imaginary part of a complex number.
Added in version 3.13.
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type PyHash_FuncDef¶
Hash function definition used by
PyHash_GetFuncDef().-
const char *name¶
Hash function name (UTF-8 encoded string).
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const int hash_bits¶
Internal size of the hash value in bits.
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const int seed_bits¶
Size of seed input in bits.
Added in version 3.4.
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const char *name¶
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PyHash_FuncDef *PyHash_GetFuncDef(void)¶
Get the hash function definition.
See also
PEP 456 “Secure and interchangeable hash algorithm”.
Added in version 3.4.
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Py_hash_t Py_HashPointer(const void *ptr)¶
Hash a pointer value: process the pointer value as an integer (cast it to
uintptr_tinternally). The pointer is not dereferenced.The function cannot fail: it cannot return
-1.Added in version 3.13.
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Py_hash_t PyObject_GenericHash(PyObject *obj)¶
Generic hashing function that is meant to be put into a type object’s
tp_hashslot. 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.