traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Move the section on concrete numeric objects before the section on 

concrete sequence objects, since their API is simpler.

This is in response to a comment in SF bug #440037.
This commit is contained in:
Fred Drake 2001-07-11 20:35:37 +00:00
parent 7bf8277e98
commit fa774872b8
1 changed files with 249 additions and 249 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

498
Doc/api/api.tex
View File

@ -2218,6 +2218,255 @@ no methods.
\end{cvardesc}
\section{Numeric Objects \label{numericObjects}}
\obindex{numeric}
\subsection{Plain Integer Objects \label{intObjects}}
\obindex{integer}
\begin{ctypedesc}{PyIntObject}
This subtype of \ctype{PyObject} represents a Python integer object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyInt_Type}
This instance of \ctype{PyTypeObject} represents the Python plain
integer type. This is the same object as \code{types.IntType}.
\withsubitem{(in modules types)}{\ttindex{IntType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyInt_Check}{PyObject* o}
Returns true if \var{o} is of type \cdata{PyInt_Type}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyInt_FromLong}{long ival}
Creates a new integer object with a value of \var{ival}.
The current implementation keeps an array of integer objects for all
integers between \code{-1} and \code{100}, when you create an int in
that range you actually just get back a reference to the existing
object. So it should be possible to change the value of \code{1}. I
suspect the behaviour of Python in this case is undefined. :-)
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_AsLong}{PyObject *io}
Will first attempt to cast the object to a \ctype{PyIntObject}, if
it is not already one, and then return its value.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_AS_LONG}{PyObject *io}
Returns the value of the object \var{io}. No error checking is
performed.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_GetMax}{}
Returns the system's idea of the largest integer it can handle
(\constant{LONG_MAX}\ttindex{LONG_MAX}, as defined in the system
header files).
\end{cfuncdesc}
\subsection{Long Integer Objects \label{longObjects}}
\obindex{long integer}
\begin{ctypedesc}{PyLongObject}
This subtype of \ctype{PyObject} represents a Python long integer
object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyLong_Type}
This instance of \ctype{PyTypeObject} represents the Python long
integer type. This is the same object as \code{types.LongType}.
\withsubitem{(in modules types)}{\ttindex{LongType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyLong_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyLongObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromLong}{long v}
Returns a new \ctype{PyLongObject} object from \var{v}, or \NULL{} on
failure.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromUnsignedLong}{unsigned long v}
Returns a new \ctype{PyLongObject} object from a C \ctype{unsigned
long}, or \NULL{} on failure.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromDouble}{double v}
Returns a new \ctype{PyLongObject} object from the integer part of
\var{v}, or \NULL{} on failure.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyLong_AsLong}{PyObject *pylong}
Returns a C \ctype{long} representation of the contents of
\var{pylong}. If \var{pylong} is greater than
\constant{LONG_MAX}\ttindex{LONG_MAX}, an \exception{OverflowError} is
raised.\withsubitem{(built-in exception)}{\ttindex{OverflowError}}
\end{cfuncdesc}
\begin{cfuncdesc}{unsigned long}{PyLong_AsUnsignedLong}{PyObject *pylong}
Returns a C \ctype{unsigned long} representation of the contents of
\var{pylong}. If \var{pylong} is greater than
\constant{ULONG_MAX}\ttindex{ULONG_MAX}, an \exception{OverflowError}
is raised.\withsubitem{(built-in exception)}{\ttindex{OverflowError}}
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyLong_AsDouble}{PyObject *pylong}
Returns a C \ctype{double} representation of the contents of \var{pylong}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromString}{char *str, char **pend,
int base}
Return a new \ctype{PyLongObject} based on the string value in
\var{str}, which is interpreted according to the radix in \var{base}.
If \var{pend} is non-\NULL, \code{*\var{pend}} will point to the first
character in \var{str} which follows the representation of the
number. If \var{base} is \code{0}, the radix will be determined base
on the leading characters of \var{str}: if \var{str} starts with
\code{'0x'} or \code{'0X'}, radix 16 will be used; if \var{str} starts
with \code{'0'}, radix 8 will be used; otherwise radix 10 will be
used. If \var{base} is not \code{0}, it must be between \code{2} and
\code{36}, inclusive. Leading spaces are ignored. If there are no
digits, \exception{ValueError} will be raised.
\end{cfuncdesc}
\subsection{Floating Point Objects \label{floatObjects}}
\obindex{floating point}
\begin{ctypedesc}{PyFloatObject}
This subtype of \ctype{PyObject} represents a Python floating point
object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyFloat_Type}
This instance of \ctype{PyTypeObject} represents the Python floating
point type. This is the same object as \code{types.FloatType}.
\withsubitem{(in modules types)}{\ttindex{FloatType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyFloat_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyFloatObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyFloat_FromDouble}{double v}
Creates a \ctype{PyFloatObject} object from \var{v}, or \NULL{} on
failure.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyFloat_AsDouble}{PyObject *pyfloat}
Returns a C \ctype{double} representation of the contents of \var{pyfloat}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyFloat_AS_DOUBLE}{PyObject *pyfloat}
Returns a C \ctype{double} representation of the contents of
\var{pyfloat}, but without error checking.
\end{cfuncdesc}
\subsection{Complex Number Objects \label{complexObjects}}
\obindex{complex number}
Python's complex number objects are implemented as two distinct types
when viewed from the C API: one is the Python object exposed to
Python programs, and the other is a C structure which represents the
actual complex number value. The API provides functions for working
with both.
\subsubsection{Complex Numbers as C Structures}
Note that the functions which accept these structures as parameters
and return them as results do so \emph{by value} rather than
dereferencing them through pointers. This is consistent throughout
the API.
\begin{ctypedesc}{Py_complex}
The C structure which corresponds to the value portion of a Python
complex number object. Most of the functions for dealing with complex
number objects use structures of this type as input or output values,
as appropriate. It is defined as:
\begin{verbatim}
typedef struct {
double real;
double imag;
} Py_complex;
\end{verbatim}
\end{ctypedesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_sum}{Py_complex left, Py_complex right}
Return the sum of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_diff}{Py_complex left, Py_complex right}
Return the difference between two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_neg}{Py_complex complex}
Return the negation of the complex number \var{complex}, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_prod}{Py_complex left, Py_complex right}
Return the product of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_quot}{Py_complex dividend,
Py_complex divisor}
Return the quotient of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_pow}{Py_complex num, Py_complex exp}
Return the exponentiation of \var{num} by \var{exp}, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\subsubsection{Complex Numbers as Python Objects}
\begin{ctypedesc}{PyComplexObject}
This subtype of \ctype{PyObject} represents a Python complex number object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyComplex_Type}
This instance of \ctype{PyTypeObject} represents the Python complex
number type.
\end{cvardesc}
\begin{cfuncdesc}{int}{PyComplex_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyComplexObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyComplex_FromCComplex}{Py_complex v}
Create a new Python complex number object from a C
\ctype{Py_complex} value.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyComplex_FromDoubles}{double real, double imag}
Returns a new \ctype{PyComplexObject} object from \var{real} and \var{imag}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyComplex_RealAsDouble}{PyObject *op}
Returns the real part of \var{op} as a C \ctype{double}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyComplex_ImagAsDouble}{PyObject *op}
Returns the imaginary part of \var{op} as a C \ctype{double}.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{PyComplex_AsCComplex}{PyObject *op}
Returns the \ctype{Py_complex} value of the complex number \var{op}.
\end{cfuncdesc}
\section{Sequence Objects \label{sequenceObjects}}
\obindex{sequence}
@ -3531,255 +3780,6 @@ while (PyDict_Next(self->dict, &pos, &key, &value)) {
\end{cfuncdesc}
\section{Numeric Objects \label{numericObjects}}
\obindex{numeric}
\subsection{Plain Integer Objects \label{intObjects}}
\obindex{integer}
\begin{ctypedesc}{PyIntObject}
This subtype of \ctype{PyObject} represents a Python integer object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyInt_Type}
This instance of \ctype{PyTypeObject} represents the Python plain
integer type. This is the same object as \code{types.IntType}.
\withsubitem{(in modules types)}{\ttindex{IntType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyInt_Check}{PyObject* o}
Returns true if \var{o} is of type \cdata{PyInt_Type}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyInt_FromLong}{long ival}
Creates a new integer object with a value of \var{ival}.
The current implementation keeps an array of integer objects for all
integers between \code{-1} and \code{100}, when you create an int in
that range you actually just get back a reference to the existing
object. So it should be possible to change the value of \code{1}. I
suspect the behaviour of Python in this case is undefined. :-)
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_AsLong}{PyObject *io}
Will first attempt to cast the object to a \ctype{PyIntObject}, if
it is not already one, and then return its value.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_AS_LONG}{PyObject *io}
Returns the value of the object \var{io}. No error checking is
performed.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyInt_GetMax}{}
Returns the system's idea of the largest integer it can handle
(\constant{LONG_MAX}\ttindex{LONG_MAX}, as defined in the system
header files).
\end{cfuncdesc}
\subsection{Long Integer Objects \label{longObjects}}
\obindex{long integer}
\begin{ctypedesc}{PyLongObject}
This subtype of \ctype{PyObject} represents a Python long integer
object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyLong_Type}
This instance of \ctype{PyTypeObject} represents the Python long
integer type. This is the same object as \code{types.LongType}.
\withsubitem{(in modules types)}{\ttindex{LongType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyLong_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyLongObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromLong}{long v}
Returns a new \ctype{PyLongObject} object from \var{v}, or \NULL{} on
failure.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromUnsignedLong}{unsigned long v}
Returns a new \ctype{PyLongObject} object from a C \ctype{unsigned
long}, or \NULL{} on failure.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromDouble}{double v}
Returns a new \ctype{PyLongObject} object from the integer part of
\var{v}, or \NULL{} on failure.
\end{cfuncdesc}
\begin{cfuncdesc}{long}{PyLong_AsLong}{PyObject *pylong}
Returns a C \ctype{long} representation of the contents of
\var{pylong}. If \var{pylong} is greater than
\constant{LONG_MAX}\ttindex{LONG_MAX}, an \exception{OverflowError} is
raised.\withsubitem{(built-in exception)}{\ttindex{OverflowError}}
\end{cfuncdesc}
\begin{cfuncdesc}{unsigned long}{PyLong_AsUnsignedLong}{PyObject *pylong}
Returns a C \ctype{unsigned long} representation of the contents of
\var{pylong}. If \var{pylong} is greater than
\constant{ULONG_MAX}\ttindex{ULONG_MAX}, an \exception{OverflowError}
is raised.\withsubitem{(built-in exception)}{\ttindex{OverflowError}}
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyLong_AsDouble}{PyObject *pylong}
Returns a C \ctype{double} representation of the contents of \var{pylong}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyLong_FromString}{char *str, char **pend,
int base}
Return a new \ctype{PyLongObject} based on the string value in
\var{str}, which is interpreted according to the radix in \var{base}.
If \var{pend} is non-\NULL, \code{*\var{pend}} will point to the first
character in \var{str} which follows the representation of the
number. If \var{base} is \code{0}, the radix will be determined base
on the leading characters of \var{str}: if \var{str} starts with
\code{'0x'} or \code{'0X'}, radix 16 will be used; if \var{str} starts
with \code{'0'}, radix 8 will be used; otherwise radix 10 will be
used. If \var{base} is not \code{0}, it must be between \code{2} and
\code{36}, inclusive. Leading spaces are ignored. If there are no
digits, \exception{ValueError} will be raised.
\end{cfuncdesc}
\subsection{Floating Point Objects \label{floatObjects}}
\obindex{floating point}
\begin{ctypedesc}{PyFloatObject}
This subtype of \ctype{PyObject} represents a Python floating point
object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyFloat_Type}
This instance of \ctype{PyTypeObject} represents the Python floating
point type. This is the same object as \code{types.FloatType}.
\withsubitem{(in modules types)}{\ttindex{FloatType}}
\end{cvardesc}
\begin{cfuncdesc}{int}{PyFloat_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyFloatObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyFloat_FromDouble}{double v}
Creates a \ctype{PyFloatObject} object from \var{v}, or \NULL{} on
failure.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyFloat_AsDouble}{PyObject *pyfloat}
Returns a C \ctype{double} representation of the contents of \var{pyfloat}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyFloat_AS_DOUBLE}{PyObject *pyfloat}
Returns a C \ctype{double} representation of the contents of
\var{pyfloat}, but without error checking.
\end{cfuncdesc}
\subsection{Complex Number Objects \label{complexObjects}}
\obindex{complex number}
Python's complex number objects are implemented as two distinct types
when viewed from the C API: one is the Python object exposed to
Python programs, and the other is a C structure which represents the
actual complex number value. The API provides functions for working
with both.
\subsubsection{Complex Numbers as C Structures}
Note that the functions which accept these structures as parameters
and return them as results do so \emph{by value} rather than
dereferencing them through pointers. This is consistent throughout
the API.
\begin{ctypedesc}{Py_complex}
The C structure which corresponds to the value portion of a Python
complex number object. Most of the functions for dealing with complex
number objects use structures of this type as input or output values,
as appropriate. It is defined as:
\begin{verbatim}
typedef struct {
double real;
double imag;
} Py_complex;
\end{verbatim}
\end{ctypedesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_sum}{Py_complex left, Py_complex right}
Return the sum of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_diff}{Py_complex left, Py_complex right}
Return the difference between two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_neg}{Py_complex complex}
Return the negation of the complex number \var{complex}, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_prod}{Py_complex left, Py_complex right}
Return the product of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_quot}{Py_complex dividend,
Py_complex divisor}
Return the quotient of two complex numbers, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{_Py_c_pow}{Py_complex num, Py_complex exp}
Return the exponentiation of \var{num} by \var{exp}, using the C
\ctype{Py_complex} representation.
\end{cfuncdesc}
\subsubsection{Complex Numbers as Python Objects}
\begin{ctypedesc}{PyComplexObject}
This subtype of \ctype{PyObject} represents a Python complex number object.
\end{ctypedesc}
\begin{cvardesc}{PyTypeObject}{PyComplex_Type}
This instance of \ctype{PyTypeObject} represents the Python complex
number type.
\end{cvardesc}
\begin{cfuncdesc}{int}{PyComplex_Check}{PyObject *p}
Returns true if its argument is a \ctype{PyComplexObject}.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyComplex_FromCComplex}{Py_complex v}
Create a new Python complex number object from a C
\ctype{Py_complex} value.
\end{cfuncdesc}
\begin{cfuncdesc}{PyObject*}{PyComplex_FromDoubles}{double real, double imag}
Returns a new \ctype{PyComplexObject} object from \var{real} and \var{imag}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyComplex_RealAsDouble}{PyObject *op}
Returns the real part of \var{op} as a C \ctype{double}.
\end{cfuncdesc}
\begin{cfuncdesc}{double}{PyComplex_ImagAsDouble}{PyObject *op}
Returns the imaginary part of \var{op} as a C \ctype{double}.
\end{cfuncdesc}
\begin{cfuncdesc}{Py_complex}{PyComplex_AsCComplex}{PyObject *op}
Returns the \ctype{Py_complex} value of the complex number \var{op}.
\end{cfuncdesc}
\section{Other Objects \label{otherObjects}}
\subsection{File Objects \label{fileObjects}}