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Python 技術手冊 第三版
book

Python 技術手冊 第三版

by lex Martelli, Anna Martelli Ravenscroft, Steve Holden
January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
GoTop Information, Inc.
Content preview from Python 技術手冊 第三版
Python C API 擴充 Python
|
745
PyFloat_AS_DOUBLE double PyFloat_AS_DOUBLE(PyObject* x)
回傳 Python
float
x
C
double
值,執行速度非常快,不進
行任何錯誤檢查。
PyList_New PyObject* PyList_New(int length)
回傳長度為給定的
length
的一個未初始化的新串列。然後
你必須初始化該串列,通常是呼叫
PyList_SET_ITEM
length
次。
PyList_GET_ITEM PyObject* PyList_GET_ITEM(PyObject* x,int pos)
回傳串列
x
pos
項目,不進行任何錯誤檢查。
PyList_SET_ITEM int PyList_SET_ITEM(PyObject* x,int pos,PyObject* v)
將串列
x
pos
項目設為
v
,不進行任何錯誤檢查。偷取對
v
的一個參考。只在以
PyList_New
建立一個新串列
x
之後
使用。
PyString_AS_STRING char* PyString_AS_STRING(PyObject* x)
回傳一個指標,指向字串
x
的內部緩衝區(internal
buffer),非常快速,不進行任何錯誤檢查。你必不能以
任何方式修改那個緩衝區,除非你剛呼叫了
PyString_
FromStringAndSize(NULL,size)
來配置(allocate)它。
PyString_AsStringAndSize ...
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Publisher Resources

ISBN: 9789864766819