Py_FdIsInteractive
(
FILE
*fp
, const char
*filename
)
¶
Return true (nonzero) if the standard I/O file
fp
with name
filename
is deemed interactive. This is the case for files for which
isatty(fileno(fp))
is true. If the global flag
Py_InteractiveFlag
is true, this function also returns true if the
filename
pointer is
NULL
or if the name is equal to one of the strings
'<stdin>'
or
'???'
.
PyOS_AfterFork
(
)
¶
Function to update some internal state after a process fork; this should be called in the new process if the Python interpreter will continue to be used. If a new executable is loaded into the new process, this function does not need to be called.
PyOS_CheckStack
(
)
¶
Return true when the interpreter runs out of stack space. This is a reliable check, but is only available when
USE_STACKCHECK
is defined (currently on Windows using the Microsoft Visual C++ compiler).
USE_STACKCHECK
will be defined automatically; you should never change the definition in your own code.
PyOS_getsig
(
int
i
)
¶
Return the current signal handler for signal
i
. This is a thin wrapper around either
sigaction()
or
signal()
。不要直接调用这些函数！
PyOS_sighandler_t
is a typedef alias for
void
(*)(int)
.
PyOS_setsig
(
int
i
, PyOS_sighandler_t
h
)
¶
Set the signal handler for signal
i
到
h
; return the old signal handler. This is a thin wrapper around either
sigaction()
or
signal()
。不要直接调用这些函数！
PyOS_sighandler_t
is a typedef alias for
void (*)(int)
.
These are utility functions that make functionality from the
sys
module accessible to C code. They all work with the current interpreter thread’s
sys
module’s dict, which is contained in the internal thread state structure.
PySys_SetObject
(
const char
*name
,
PyObject
*v
)
¶
Set
name
在
sys
module to
v
unless
v
is
NULL
，在这种情况下
name
is deleted from the sys module. Returns
0
当成功时，
-1
当出错时。
PySys_ResetWarnOptions
(
)
¶
重置
sys.warnoptions
to an empty list.
PySys_AddWarnOption
(
wchar_t
*s
)
¶
追加
s
to
sys.warnoptions
.
PySys_AddWarnOptionUnicode
(
PyObject
*unicode
)
¶
追加
unicode
to
sys.warnoptions
.
PySys_SetPath
(
wchar_t
*path
)
¶
Set
sys.path
to a list object of paths found in
path
which should be a list of paths separated with the platform’s search path delimiter (
:
在 Unix，
;
在 Windows)。
PySys_WriteStdout
(
const char
*format
, ...
)
¶
Write the output string described by
format
to
sys.stdout
. No exceptions are raised, even if truncation occurs (see below).
format should limit the total size of the formatted output string to 1000 bytes or less – after 1000 bytes, the output string is truncated. In particular, this means that no unrestricted “%s” formats should occur; these should be limited using “%.<N>s” where <N> is a decimal number calculated so that <N> plus the maximum size of other formatted text does not exceed 1000 bytes. Also watch out for “%f”, which can print hundreds of digits for very large numbers.
If a problem occurs, or
sys.stdout
is unset, the formatted message is written to the real (C level)
stdout
.
PySys_WriteStderr
(
const char
*format
, ...
)
¶
As
PySys_WriteStdout()
，但写入
sys.stderr
or
stderr
代替。
PySys_FormatStdout
(
const char
*format
, ...
)
¶
Function similar to PySys_WriteStdout() but format the message using
PyUnicode_FromFormatV()
and don’t truncate the message to an arbitrary length.
3.2 版新增。
PySys_FormatStderr
(
const char
*format
, ...
)
¶
As
PySys_FormatStdout()
，但写入
sys.stderr
or
stderr
代替。
3.2 版新增。
PySys_AddXOption
(
const wchar_t
*s
)
¶
剖析
s
as a set of
-X
options and add them to the current options mapping as returned by
PySys_GetXOptions()
.
3.2 版新增。
PySys_GetXOptions
(
)
¶
返回当前字典为
-X
选项，类似于
sys._xoptions
。当出错时，
NULL
被返回并设置异常。
3.2 版新增。
Py_FatalError
(
const char
*message
)
¶
Print a fatal error message and kill the process. No cleanup is performed. This function should only be invoked when a condition is detected that would make it dangerous to continue using the Python interpreter; e.g., when the object administration appears to be corrupted. On Unix, the standard C library function
abort()
is called which will attempt to produce a
core
文件。
Py_Exit
(
int
status
)
¶
退出当前进程。这调用
Py_Finalize()
然后调用标准 C 库函数
exit(status)
.
Py_AtExit
(
void (
*func
)()
)
¶
Register a cleanup function to be called by
Py_Finalize()
. The cleanup function will be called with no arguments and should return no value. At most 32 cleanup functions can be registered. When the registration is successful,
Py_AtExit()
返回
0
; on failure, it returns
-1
. The cleanup function registered last is called first. Each cleanup function will be called at most once. Since Python’s internal finalization will have completed before the cleanup function, no Python APIs should be called by
func
.