Utilitários do Sistema Operacional¶
-
PyObject*
PyOS_FSPath
(PyObject *path)¶ - Return value: New reference.
Return the file system representation for path. If the object is a
str
orbytes
object, then its reference count is incremented. If the object implements theos.PathLike
interface, then__fspath__()
is returned as long as it is astr
orbytes
object. OtherwiseTypeError
is raised andNULL
is returned.Novo na versão 3.6.
-
int
Py_FdIsInteractive
(FILE *fp, const char *filename)¶ Retornar verdadeiro (diferente de zero) se o arquivo de I/O padrão * fp * com o nome filename for considerado interativo. Este é o caso dos arquivos para os quais `` isatty (fileno (fp)) `` é verdade. Se o sinalizador global: c: data: Py_InteractiveFlag é verdadeiro, esta função também retorna true se o apontador * filename * for * NULL * ou se o nome for igual a uma das strings` ‘<stdin>’ ` Ou `` ‘???’ ``.
-
void
PyOS_AfterFork
()¶ Função para atualizar algum estado interno após um processo de garfo; Isso deve ser chamado no novo processo se o intérprete do Python continuar a ser usado. Se um novo executável é carregado no novo processo, esta função não precisa ser chamada.
-
int
PyOS_CheckStack
()¶ Retornar verdadeiro quando o intérprete ficar sem espaço de pilha. Esta é uma verificação confiável, mas só está disponível quando: const: USE_STACKCHECK está definido (atualmente no Windows usando o compilador Microsoft Visual C ++). : Const: USE_STACKCHECK será definido automaticamente; Você nunca deve mudar a definição em seu próprio código.
-
PyOS_sighandler_t
PyOS_getsig
(int i)¶ Retorna o manipulador de sinal atual para o sinal * i *. Este é um invólucro fino em torno de: c: func: sigaction ou: c: func:` signal`. Não ligue para essas funções diretamente! : C: digite: PyOS_sighandler_t é um alias de typedef para: c: digite:` void (*) (int) `.
-
PyOS_sighandler_t
PyOS_setsig
(int i, PyOS_sighandler_t h)¶ Defina o manipulador de sinal para que o sinal * i * seja * h *; Devolva o antigo manipulador de sinal. Este é um invólucro fino em torno de: c: func: sigaction ou: c: func:` signal`. Não ligue para essas funções diretamente! : C: digite: PyOS_sighandler_t é um alias de typedef para: c: digite:` void (*) (int) `.
-
wchar_t*
Py_DecodeLocale
(const char* arg, size_t *size)¶ Decode a byte string from the locale encoding with the surrogateescape error handler: undecodable bytes are decoded as characters in range U+DC80..U+DCFF. If a byte sequence can be decoded as a surrogate character, escape the bytes using the surrogateescape error handler instead of decoding them.
Encoding, highest priority to lowest priority:
UTF-8
on macOS and Android;ASCII
if theLC_CTYPE
locale is"C"
,nl_langinfo(CODESET)
returns theASCII
encoding (or an alias), andmbstowcs()
andwcstombs()
functions use theISO-8859-1
encoding.the current locale encoding (
LC_CTYPE
locale).
Return a pointer to a newly allocated wide character string, use
PyMem_RawFree()
to free the memory. If size is notNULL
, write the number of wide characters excluding the null character into*size
.Return
NULL
on decoding error or memory allocation error. If size is notNULL
,*size
is set to(size_t)-1
on memory error or set to(size_t)-2
on decoding error.Decoding errors should never happen, unless there is a bug in the C library.
Use the
Py_EncodeLocale()
function to encode the character string back to a byte string.Ver também
The
PyUnicode_DecodeFSDefaultAndSize()
andPyUnicode_DecodeLocaleAndSize()
functions.Novo na versão 3.5.
-
char*
Py_EncodeLocale
(const wchar_t *text, size_t *error_pos)¶ Encode a wide character string to the locale encoding with the surrogateescape error handler: surrogate characters in the range U+DC80..U+DCFF are converted to bytes 0x80..0xFF.
Encoding, highest priority to lowest priority:
UTF-8
on macOS and Android;ASCII
if theLC_CTYPE
locale is"C"
,nl_langinfo(CODESET)
returns theASCII
encoding (or an alias), andmbstowcs()
andwcstombs()
functions uses theISO-8859-1
encoding.the current locale encoding.
Return a pointer to a newly allocated byte string, use
PyMem_Free()
to free the memory. ReturnNULL
on encoding error or memory allocation errorIf error_pos is not
NULL
,*error_pos
is set to the index of the invalid character on encoding error, or set to(size_t)-1
otherwise.Use the
Py_DecodeLocale()
function to decode the bytes string back to a wide character string.Ver também
The
PyUnicode_EncodeFSDefault()
andPyUnicode_EncodeLocale()
functions.Novo na versão 3.5.
System Functions¶
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.
-
PyObject *
PySys_GetObject
(const char *name)¶ - Return value: Borrowed reference.
Return the object name from the
sys
module or NULL if it does not exist, without setting an exception.
-
int
PySys_SetObject
(const char *name, PyObject *v)¶ Set name in the
sys
module to v unless v is NULL, in which case name is deleted from the sys module. Returns0
on success,-1
on error.
-
void
PySys_ResetWarnOptions
()¶ Reset
sys.warnoptions
to an empty list.
-
void
PySys_AddWarnOption
(wchar_t *s)¶ Append s to
sys.warnoptions
.
-
void
PySys_AddWarnOptionUnicode
(PyObject *unicode)¶ Append unicode to
sys.warnoptions
.
-
void
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 (:
on Unix,;
on Windows).
-
void
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.
-
void
PySys_WriteStderr
(const char *format, ...)¶ As
PySys_WriteStdout()
, but write tosys.stderr
or stderr instead.
-
void
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.Novo na versão 3.2.
-
void
PySys_FormatStderr
(const char *format, ...)¶ As
PySys_FormatStdout()
, but write tosys.stderr
or stderr instead.Novo na versão 3.2.
-
void
PySys_AddXOption
(const wchar_t *s)¶ Parse s as a set of
-X
options and add them to the current options mapping as returned byPySys_GetXOptions()
.Novo na versão 3.2.
-
PyObject *
PySys_GetXOptions
()¶ - Return value: Borrowed reference.
Return the current dictionary of
-X
options, similarly tosys._xoptions
. On error, NULL is returned and an exception is set.Novo na versão 3.2.
Process Control¶
-
void
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 acore
file.
-
void
Py_Exit
(int status)¶ Exit the current process. This calls
Py_FinalizeEx()
and then calls the standard C library functionexit(status)
. IfPy_FinalizeEx()
indicates an error, the exit status is set to 120.Alterado na versão 3.6: Errors from finalization no longer ignored.
-
int
Py_AtExit
(void (*func)())¶ Register a cleanup function to be called by
Py_FinalizeEx()
. 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()
returns0
; 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.