author | martin.trojer@nokia.com |
Fri, 31 Jul 2009 15:01:17 +0100 | |
changeset 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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.. highlightlang:: c |
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.. _floatobjects: |
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Floating Point Objects |
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---------------------- |
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.. index:: object: floating point |
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.. ctype:: PyFloatObject |
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This subtype of :ctype:`PyObject` represents a Python floating point object. |
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.. cvar:: PyTypeObject PyFloat_Type |
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.. index:: single: FloatType (in modules types) |
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This instance of :ctype:`PyTypeObject` represents the Python floating point |
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type. This is the same object as ``float`` and ``types.FloatType``. |
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.. cfunction:: int PyFloat_Check(PyObject *p) |
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Return true if its argument is a :ctype:`PyFloatObject` or a subtype of |
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:ctype:`PyFloatObject`. |
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.. versionchanged:: 2.2 |
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Allowed subtypes to be accepted. |
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.. cfunction:: int PyFloat_CheckExact(PyObject *p) |
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Return true if its argument is a :ctype:`PyFloatObject`, but not a subtype of |
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:ctype:`PyFloatObject`. |
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.. versionadded:: 2.2 |
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.. cfunction:: PyObject* PyFloat_FromString(PyObject *str, char **pend) |
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Create a :ctype:`PyFloatObject` object based on the string value in *str*, or |
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*NULL* on failure. The *pend* argument is ignored. It remains only for |
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backward compatibility. |
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.. cfunction:: PyObject* PyFloat_FromDouble(double v) |
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Create a :ctype:`PyFloatObject` object from *v*, or *NULL* on failure. |
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.. cfunction:: double PyFloat_AsDouble(PyObject *pyfloat) |
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Return a C :ctype:`double` representation of the contents of *pyfloat*. If |
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*pyfloat* is not a Python floating point object but has a :meth:`__float__` |
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method, this method will first be called to convert *pyfloat* into a float. |
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.. cfunction:: double PyFloat_AS_DOUBLE(PyObject *pyfloat) |
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Return a C :ctype:`double` representation of the contents of *pyfloat*, but |
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without error checking. |
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.. cfunction:: PyObject* PyFloat_GetInfo(void) |
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Return a structseq instance which contains information about the |
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precision, minimum and maximum values of a float. It's a thin wrapper |
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around the header file :file:`float.h`. |
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.. versionadded:: 2.6 |
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.. cfunction:: double PyFloat_GetMax(void) |
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Return the maximum representable finite float *DBL_MAX* as C :ctype:`double`. |
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.. versionadded:: 2.6 |
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.. cfunction:: double PyFloat_GetMin(void) |
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Return the minimum normalized positive float *DBL_MIN* as C :ctype:`double`. |
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.. versionadded:: 2.6 |
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.. cfunction:: int PyFloat_ClearFreeList(void) |
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Clear the float free list. Return the number of items that could not |
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be freed. |
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.. versionadded:: 2.6 |