Python 初始化配置 ¶

3.8 版新增。

Structures:

• PyConfig

• PyPreConfig

• PyStatus

• PyWideStringList

函数：

• PyConfig_Clear()

• PyConfig_InitIsolatedConfig()

• PyConfig_InitPythonConfig()

• PyConfig_Read()

• PyConfig_SetArgv()

• PyConfig_SetBytesArgv()

• PyConfig_SetBytesString()

• PyConfig_SetString()

• PyConfig_SetWideStringList()

• PyPreConfig_InitIsolatedConfig()

• PyPreConfig_InitPythonConfig()

• PyStatus_Error()

• PyStatus_Exception()

• PyStatus_Exit()

• PyStatus_IsError()

• PyStatus_IsExit()

• PyStatus_NoMemory()

• PyStatus_Ok()

• PyWideStringList_Append()

• PyWideStringList_Insert()

• Py_ExitStatusException()

• Py_InitializeFromConfig()

• Py_PreInitialize()

• Py_PreInitializeFromArgs()

• Py_PreInitializeFromBytesArgs()

• Py_RunMain()

The preconfiguration ( PyPreConfig type) is stored in _PyRuntime.preconfig and the configuration ( PyConfig type) is stored in PyInterpreterState.config .

另请参阅 初始化、定稿和线程 .

另请参阅

PEP 587 Python 初始化配置。

PyWideStringList ¶

PyWideStringList ¶

List of wchar_t* strings.

若 length 非 0， 项 must be non- NULL and all strings must be non- NULL .

Methods:

PyStatus PyWideStringList_Append ( PyWideStringList *list , const wchar_t *item ) ¶

追加 item to list .

Python must be preinitialized to call this function.

PyStatus PyWideStringList_Insert ( PyWideStringList *list , Py_ssize_t index , const wchar_t *item ) ¶

插入 item into list at index .

若 index >= list length, append item to list .

index must be greater than or equal to 0.

Python must be preinitialized to call this function.

Structure fields:

Py_ssize_t length ¶

List length.

wchar_t** 项 ¶

List items.

PyStatus ¶

PyStatus ¶

Structure to store an initialization function status: success, error or exit.

For an error, it can store the C function name which created the error.

Structure fields:

int exitcode ¶

Exit code. Argument passed to exit() .

const char * err_msg ¶

Error message.

const char * func ¶

Name of the function which created an error, can be NULL .

Functions to create a status:

PyStatus PyStatus_Ok ( void ) ¶

Success.

PyStatus PyStatus_Error ( const char *err_msg ) ¶

Initialization error with a message.

PyStatus PyStatus_NoMemory ( void ) ¶

Memory allocation failure (out of memory).

PyStatus PyStatus_Exit ( int exitcode ) ¶

Exit Python with the specified exit code.

Functions to handle a status:

int PyStatus_Exception ( PyStatus status ) ¶

Is the status an error or an exit? If true, the exception must be handled; by calling Py_ExitStatusException() 例如。

int PyStatus_IsError ( PyStatus status ) ¶

Is the result an error?

int PyStatus_IsExit ( PyStatus status ) ¶

Is the result an exit?

void Py_ExitStatusException ( PyStatus status ) ¶

调用 exit(exitcode) if status is an exit. Print the error message and exit with a non-zero exit code if status is an error. Must only be called if PyStatus_Exception(status) is non-zero.

注意

Internally, Python uses macros which set PyStatus.func , whereas functions to create a status set func to NULL .

范例：

PyStatus alloc(void **ptr, size_t size)
{
    *ptr = PyMem_RawMalloc(size);
    if (*ptr == NULL) {
        return PyStatus_NoMemory();
    }
    return PyStatus_Ok();
}
int main(int argc, char **argv)
{
    void *ptr;
    PyStatus status = alloc(&ptr, 16);
    if (PyStatus_Exception(status)) {
        Py_ExitStatusException(status);
    }
    PyMem_Free(ptr);
    return 0;
}
						

PyPreConfig ¶

PyPreConfig ¶

Structure used to preinitialize Python:

• Set the Python memory allocator

• Configure the LC_CTYPE locale

• Set the UTF-8 mode

Function to initialize a preconfiguration:

void PyPreConfig_InitPythonConfig ( PyPreConfig *preconfig ) ¶

Initialize the preconfiguration with Python 配置 .

void PyPreConfig_InitIsolatedConfig ( PyPreConfig *preconfig ) ¶

Initialize the preconfiguration with 隔离配置 .

Structure fields:

int allocator ¶

Name of the memory allocator:

• PYMEM_ALLOCATOR_NOT_SET ( 0 ): don’t change memory allocators (use defaults)

• PYMEM_ALLOCATOR_DEFAULT ( 1 ): default memory allocators

• PYMEM_ALLOCATOR_DEBUG ( 2 ): default memory allocators with debug hooks

• PYMEM_ALLOCATOR_MALLOC ( 3 ): force usage of malloc()

• PYMEM_ALLOCATOR_MALLOC_DEBUG ( 4 ): force usage of malloc() with debug hooks

• PYMEM_ALLOCATOR_PYMALLOC ( 5 ): Python pymalloc memory allocator

• PYMEM_ALLOCATOR_PYMALLOC_DEBUG ( 6 ): Python pymalloc memory allocator with debug hooks

PYMEM_ALLOCATOR_PYMALLOC and PYMEM_ALLOCATOR_PYMALLOC_DEBUG are not supported if Python is configured using --without-pymalloc

见 内存管理 .

int configure_locale ¶

Set the LC_CTYPE locale to the user preferred locale? If equals to 0, set coerce_c_locale and coerce_c_locale_warn to 0.

int coerce_c_locale ¶

If equals to 2, coerce the C locale; if equals to 1, read the LC_CTYPE locale to decide if it should be coerced.

int coerce_c_locale_warn ¶

If non-zero, emit a warning if the C locale is coerced.

int dev_mode ¶

见 PyConfig.dev_mode .

int isolated ¶

见 PyConfig.isolated .

int legacy_windows_fs_encoding ( Windows only ) ¶

If non-zero, disable UTF-8 Mode, set the Python filesystem encoding to mbcs , set the filesystem error handler to replace .

只可用于 Windows。 #ifdef MS_WINDOWS macro can be used for Windows specific code.

int parse_argv ¶

If non-zero, Py_PreInitializeFromArgs() and Py_PreInitializeFromBytesArgs() parse their argv argument the same way the regular Python parses command line arguments: see 命令行自变量 .

int use_environment ¶

见 PyConfig.use_environment .

int utf8_mode ¶

If non-zero, enable the UTF-8 mode.

采用 PyPreConfig 预初始化 ¶

Functions to preinitialize Python:

PyStatus Py_PreInitialize ( const PyPreConfig *preconfig ) ¶

Preinitialize Python from preconfig preconfiguration.

PyStatus Py_PreInitializeFromBytesArgs ( const PyPreConfig *preconfig , int argc , char * const *argv ) ¶

Preinitialize Python from preconfig preconfiguration and command line arguments (bytes strings).

PyStatus Py_PreInitializeFromArgs ( const PyPreConfig *preconfig , int argc , wchar_t * const * argv ) ¶

Preinitialize Python from preconfig preconfiguration and command line arguments (wide strings).

调用者负责处理异常 (错误或退出) 使用 PyStatus_Exception() and Py_ExitStatusException() .

For Python 配置 ( PyPreConfig_InitPythonConfig() ), if Python is initialized with command line arguments, the command line arguments must also be passed to preinitialize Python, since they have an effect on the pre-configuration like encodings. For example, the -X utf8 command line option enables the UTF-8 Mode.

PyMem_SetAllocator() can be called after Py_PreInitialize() and before Py_InitializeFromConfig() to install a custom memory allocator. It can be called before Py_PreInitialize() if PyPreConfig.allocator 被设为 PYMEM_ALLOCATOR_NOT_SET .

Python memory allocation functions like PyMem_RawMalloc() must not be used before Python preinitialization, whereas calling directly malloc() and free() is always safe. Py_DecodeLocale() must not be called before the preinitialization.

Example using the preinitialization to enable the UTF-8 Mode:

PyStatus status;
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.utf8_mode = 1;
status = Py_PreInitialize(&preconfig);
if (PyStatus_Exception(status)) {
    Py_ExitStatusException(status);
}
/* at this point, Python will speak UTF-8 */
Py_Initialize();
/* ... use Python API here ... */
Py_Finalize();
						

PyConfig ¶

PyConfig ¶

Structure containing most parameters to configure Python.

Structure 方法：

void PyConfig_InitPythonConfig ( PyConfig *config ) ¶

Initialize configuration with Python 配置 .

void PyConfig_InitIsolatedConfig ( PyConfig *config ) ¶

Initialize configuration with 隔离配置 .

PyStatus PyConfig_SetString ( PyConfig *config , wchar_t * const *config_str , const wchar_t *str ) ¶

Copy the wide character string str into *config_str .

Preinitialize Python if needed.

PyStatus PyConfig_SetBytesString ( PyConfig *config , wchar_t * const *config_str , const char *str ) ¶

解码 str 使用 Py_DecodeLocale() and set the result into *config_str .

Preinitialize Python if needed.

PyStatus PyConfig_SetArgv ( PyConfig *config , int argc , wchar_t * const *argv ) ¶

Set command line arguments from wide character strings.

Preinitialize Python if needed.

PyStatus PyConfig_SetBytesArgv ( PyConfig *config , int argc , char * const *argv ) ¶

Set command line arguments: decode bytes using Py_DecodeLocale() .

Preinitialize Python if needed.

PyStatus PyConfig_SetWideStringList ( PyConfig *config , PyWideStringList *list , Py_ssize_t length , wchar_t **items ) ¶

设置宽字符串列表 list to length and 项 .

Preinitialize Python if needed.

PyStatus PyConfig_Read ( PyConfig *config ) ¶

读取所有 Python 配置。

Fields which are already initialized are left unchanged.

Preinitialize Python if needed.

void PyConfig_Clear ( PyConfig *config ) ¶

Release configuration memory.

Most PyConfig methods preinitialize Python if needed. In that case, the Python preinitialization configuration in based on the PyConfig . If configuration fields which are in common with PyPreConfig are tuned, they must be set before calling a PyConfig 方法：

• dev_mode

• isolated

• parse_argv

• use_environment

Moreover, if PyConfig_SetArgv() or PyConfig_SetBytesArgv() is used, this method must be called first, before other methods, since the preinitialization configuration depends on command line arguments (if parse_argv is non-zero).

The caller of these methods is responsible to handle exceptions (error or exit) using PyStatus_Exception() and Py_ExitStatusException() .

Structure fields:

PyWideStringList argv ¶

Command line arguments, sys.argv 。见 parse_argv to parse argv the same way the regular Python parses Python command line arguments. If argv is empty, an empty string is added to ensure that sys.argv always exists and is never empty.

wchar_t* base_exec_prefix ¶

sys.base_exec_prefix .

wchar_t* base_executable ¶

sys._base_executable : __PYVENV_LAUNCHER__ environment variable value, or copy of PyConfig.executable .

wchar_t* base_prefix ¶

sys.base_prefix .

int buffered_stdio ¶

If equals to 0, enable unbuffered mode, making the stdout and stderr streams unbuffered.

stdin is always opened in buffered mode.

int bytes_warning ¶

If equals to 1, issue a warning when comparing bytes or bytearray with str , or comparing bytes with int . If equal or greater to 2, raise a BytesWarning 异常。

wchar_t* check_hash_pycs_mode ¶

Control the validation behavior of hash-based .pyc files (see PEP 552 ): --check-hash-based-pycs command line option value.

Valid values: always , never and default .

The default value is: default .

int configure_c_stdio ¶

If non-zero, configure C standard streams ( stdio , stdout , stdout ). For example, set their mode to O_BINARY 在 Windows。

int dev_mode ¶

Development mode: see -X dev .

int dump_refs ¶

If non-zero, dump all objects which are still alive at exit.

Require a debug build of Python ( Py_REF_DEBUG macro must be defined).

wchar_t* exec_prefix ¶

sys.exec_prefix .

wchar_t* executable ¶

sys.executable .

int faulthandler ¶

If non-zero, call faulthandler.enable() at startup.

wchar_t* filesystem_encoding ¶

Filesystem encoding, sys.getfilesystemencoding() .

wchar_t* filesystem_errors ¶

Filesystem encoding errors, sys.getfilesystemencodeerrors() .

unsigned long hash_seed ¶

int use_hash_seed ¶

Randomized hash function seed.

若 use_hash_seed is zero, a seed is chosen randomly at Pythonstartup, and hash_seed 被忽略。

wchar_t* home ¶

Python home directory.

Initialized from PYTHONHOME environment variable value by default.

int import_time ¶

If non-zero, profile import time.

int inspect ¶

Enter interactive mode after executing a script or a command.

int install_signal_handlers ¶

Install signal handlers?

int interactive ¶

Interactive mode.

int isolated ¶

If greater than 0, enable isolated mode:

• sys.path contains neither the script’s directory (computed from argv[0] or the current directory) nor the user’s site-packages directory.

• Python REPL doesn’t import readline nor enable default readline configuration on interactive prompts.

• Set use_environment and user_site_directory to 0.

int legacy_windows_stdio ¶

If non-zero, use io.FileIO 而不是 io.WindowsConsoleIO for sys.stdin , sys.stdout and sys.stderr .

只可用于 Windows。 #ifdef MS_WINDOWS macro can be used for Windows specific code.

int malloc_stats ¶

If non-zero, dump statistics on Python pymalloc memory allocator at exit.

The option is ignored if Python is built using --without-pymalloc .

wchar_t* pythonpath_env ¶

Module search paths as a string separated by DELIM ( os.path.pathsep ).

Initialized from PYTHONPATH environment variable value by default.

PyWideStringList module_search_paths ¶

int module_search_paths_set ¶

sys.path 。若 module_search_paths_set is equal to 0, the module_search_paths is overridden by the function calculating the 路径配置 .

int optimization_level ¶

编译优化级别：

• 0: Peephole optimizer (and __debug__ 被设为 True )

• 1: Remove assertions, set __debug__ to False

• 2: Strip docstrings

int parse_argv ¶

If non-zero, parse argv the same way the regular Python command line arguments, and strip Python arguments from argv : see 命令行自变量 .

int parser_debug ¶

If non-zero, turn on parser debugging output (for expert only, depending on compilation options).

int pathconfig_warnings ¶

If equal to 0, suppress warnings when calculating the 路径配置 (Unix only, Windows does not log any warning). Otherwise, warnings are written into stderr .

wchar_t* prefix ¶

sys.prefix .

wchar_t* program_name ¶

Program name. Used to initialize executable , and in early error messages.

wchar_t* pycache_prefix ¶

sys.pycache_prefix : .pyc cache prefix.

若 NULL , sys.pycache_prefix 被设为 None .

int quiet ¶

Quiet mode. For example, don’t display the copyright and version messages in interactive mode.

wchar_t* run_command ¶

python3 -c COMMAND argument. Used by Py_RunMain() .

wchar_t* run_filename ¶

python3 FILENAME argument. Used by Py_RunMain() .

wchar_t* run_module ¶

python3 -m MODULE argument. Used by Py_RunMain() .

int show_alloc_count ¶

Show allocation counts at exit?

Set to 1 by -X showalloccount 命令行选项。

Need a special Python build with COUNT_ALLOCS macro defined.

int show_ref_count ¶

Show total reference count at exit?

Set to 1 by -X showrefcount 命令行选项。

Need a debug build of Python ( Py_REF_DEBUG macro must be defined).

int site_import ¶

导入 site module at startup?

int skip_source_first_line ¶

Skip the first line of the source?

wchar_t* stdio_encoding ¶

wchar_t* stdio_errors ¶

Encoding and encoding errors of sys.stdin , sys.stdout and sys.stderr .

int tracemalloc ¶

If non-zero, call tracemalloc.start() at startup.

int use_environment ¶

If greater than 0, use 环境变量 .

int user_site_directory ¶

If non-zero, add user site directory to sys.path .

int verbose ¶

If non-zero, enable verbose mode.

PyWideStringList warnoptions ¶

sys.warnoptions : options of the warnings module to build warnings filters: lowest to highest priority.

The warnings module adds sys.warnoptions in the reverse order: the last PyConfig.warnoptions item becomes the first item of warnings.filters which is checked first (highest priority).

int write_bytecode ¶

If non-zero, write .pyc 文件。

sys.dont_write_bytecode is initialized to the inverted value of write_bytecode .

PyWideStringList xoptions ¶

sys._xoptions .

若 parse_argv 非 0， argv arguments are parsed the same way the regular Python parses command line arguments, and Python arguments are stripped from argv : see 命令行自变量 .

The xoptions options are parsed to set other options: see -X 选项。

采用 PyConfig 初始化 ¶

用于初始化 Python 的函数：

PyStatus Py_InitializeFromConfig ( const PyConfig *config ) ¶

初始化 Python 从 config 配置。

调用者负责处理异常 (错误或退出) 使用 PyStatus_Exception() and Py_ExitStatusException() .

若 PyImport_FrozenModules , PyImport_AppendInittab() or PyImport_ExtendInittab() are used, they must be set or called after Python preinitialization and before the Python initialization.

范例设置程序名称：

void init_python(void)
{
    PyStatus status;
    PyConfig config;
    PyConfig_InitPythonConfig(&config);
    /* Set the program name. Implicitly preinitialize Python. */
    status = PyConfig_SetString(&config, &config.program_name,
                                L"/path/to/my_program");
    if (PyStatus_Exception(status)) {
        goto fail;
    }
    status = Py_InitializeFromConfig(&config);
    if (PyStatus_Exception(status)) {
        goto fail;
    }
    PyConfig_Clear(&config);
    return;
fail:
    PyConfig_Clear(&config);
    Py_ExitStatusException(status);
}
						

More complete example modifying the default configuration, read the configuration, and then override some parameters:

PyStatus init_python(const char *program_name)
{
    PyStatus status;
    PyConfig config;
    PyConfig_InitPythonConfig(&config);
    /* Set the program name before reading the configuration
       (decode byte string from the locale encoding).
       Implicitly preinitialize Python. */
    status = PyConfig_SetBytesString(&config, &config.program_name,
                                  program_name);
    if (PyStatus_Exception(status)) {
        goto done;
    }
    /* Read all configuration at once */
    status = PyConfig_Read(&config);
    if (PyStatus_Exception(status)) {
        goto done;
    }
    /* Append our custom search path to sys.path */
    status = PyWideStringList_Append(&config.module_search_paths,
                                     L"/path/to/more/modules");
    if (PyStatus_Exception(status)) {
        goto done;
    }
    /* Override executable computed by PyConfig_Read() */
    status = PyConfig_SetString(&config, &config.executable,
                                L"/path/to/my_executable");
    if (PyStatus_Exception(status)) {
        goto done;
    }
    status = Py_InitializeFromConfig(&config);
done:
    PyConfig_Clear(&config);
    return status;
}
			
						

隔离配置 ¶

PyPreConfig_InitIsolatedConfig() and PyConfig_InitIsolatedConfig() functions create a configuration to isolate Python from the system. For example, to embed Python into an application.

This configuration ignores global configuration variables, environments variables, command line arguments ( PyConfig.argv is not parsed) and user site directory. The C standard streams (ex: stdout ) and the LC_CTYPE locale are left unchanged. Signal handlers are not installed.

Configuration files are still used with this configuration. Set the 路径配置 (“output fields”) to ignore these configuration files and avoid the function computing the default path configuration.

Python 配置 ¶

PyPreConfig_InitPythonConfig() and PyConfig_InitPythonConfig() functions create a configuration to build a customized Python which behaves as the regular Python.

Environments variables and command line arguments are used to configure Python, whereas global configuration variables are ignored.

此函数启用 C 区域设置强制 ( PEP 538 ) and UTF-8 Mode ( PEP 540 ) 从属 LC_CTYPE 区域设置， PYTHONUTF8 and PYTHONCOERCECLOCALE 环境变量。

Example of customized Python always running in isolated mode:

int main(int argc, char **argv)
{
    PyStatus status;
    PyConfig config;
    PyConfig_InitPythonConfig(&config);
    config.isolated = 1;
    /* Decode command line arguments.
       Implicitly preinitialize Python (in isolated mode). */
    status = PyConfig_SetBytesArgv(&config, argc, argv);
    if (PyStatus_Exception(status)) {
        goto fail;
    }
    status = Py_InitializeFromConfig(&config);
    if (PyStatus_Exception(status)) {
        goto fail;
    }
    PyConfig_Clear(&config);
    return Py_RunMain();
fail:
    PyConfig_Clear(&config);
    if (PyStatus_IsExit(status)) {
        return status.exitcode;
    }
    /* Display the error message and exit the process with
       non-zero exit code */
    Py_ExitStatusException(status);
}
			
						

路径配置 ¶

PyConfig 包含路径配置的多个字段：

• 路径配置输入：

  • PyConfig.home

  • PyConfig.pathconfig_warnings

  • PyConfig.program_name

  • PyConfig.pythonpath_env

  • current working directory: to get absolute paths

  • PATH environment variable to get the program full path (from PyConfig.program_name )

  • __PYVENV_LAUNCHER__ 环境变量

  • (Windows only) Application paths in the registry under “SoftwarePythonPythonCoreX.YPythonPath” of HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE (where X.Y is the Python version).

• 路径配置输出字段：

  • PyConfig.base_exec_prefix

  • PyConfig.base_executable

  • PyConfig.base_prefix

  • PyConfig.exec_prefix

  • PyConfig.executable

  • PyConfig.module_search_paths_set , PyConfig.module_search_paths

  • PyConfig.prefix

If at least one “output field” is not set, Python calculates the path configuration to fill unset fields. If module_search_paths_set is equal to 0, module_search_paths is overridden and module_search_paths_set 被设为 1。

It is possible to completely ignore the function calculating the default path configuration by setting explicitly all path configuration output fields listed above. A string is considered as set even if it is non-empty. module_search_paths is considered as set if module_search_paths_set is set to 1. In this case, path configuration input fields are ignored as well.

Set pathconfig_warnings to 0 to suppress warnings when calculating the path configuration (Unix only, Windows does not log any warning).

若 base_prefix or base_exec_prefix fields are not set, they inherit their value from prefix and exec_prefix 分别。

Py_RunMain() and Py_Main() 修改 sys.path :

• 若 run_filename is set and is a directory which contains a __main__.py script, prepend run_filename to sys.path .

• 若 isolated 为 0：

  • 若 run_module is set, prepend the current directory to sys.path . Do nothing if the current directory cannot be read.

  • 若 run_filename is set, prepend the directory of the filename to sys.path .

  • Otherwise, prepend an empty string to sys.path .

若 site_import 非 0， sys.path can be modified by the site module. If user_site_directory is non-zero and the user’s site-package directory exists, the site module appends the user’s site-package directory to sys.path .

The following configuration files are used by the path configuration:

• pyvenv.cfg

• python._pth (Windows only)

• pybuilddir.txt (仅 Unix)

The __PYVENV_LAUNCHER__ 环境变量用于设置 PyConfig.base_executable

Py_RunMain() ¶

int Py_RunMain ( void ) ¶

执行命令 ( PyConfig.run_command )，脚本 ( PyConfig.run_filename ) 或模块 ( PyConfig.run_module ) specified on the command line or in the configuration.

By default and when if -i option is used, run the REPL.

Finally, finalizes Python and returns an exit status that can be passed to the exit() 函数。

见 Python 配置 for an example of customized Python always running in isolated mode using Py_RunMain() .

多阶段初始化私有暂行 API ¶

This section is a private provisional API introducing multi-phase initialization, the core feature of the PEP 432 :

• “Core” initialization phase, “bare minimum Python”:

  • Builtin types;

  • Builtin exceptions;

  • Builtin and frozen modules;

  • The sys module is only partially initialized (ex: sys.path doesn’t exist yet).

• “Main” initialization phase, Python is fully initialized:

  • Install and configure importlib ;

  • Apply the 路径配置 ;

  • Install signal handlers;

  • Finish sys module initialization (ex: create sys.stdout and sys.path );

  • Enable optional features like faulthandler and tracemalloc ;

  • 导入 site 模块；

  • etc.

Private provisional API:

• PyConfig._init_main : if set to 0, Py_InitializeFromConfig() stops at the “Core” initialization phase.

PyStatus _Py_InitializeMain ( void ) ¶

Move to the “Main” initialization phase, finish the Python initialization.

No module is imported during the “Core” phase and the importlib module is not configured: the 路径配置 is only applied during the “Main” phase. It may allow to customize Python in Python to override or tune the 路径配置 , maybe install a custom sys.meta_path importer or an import hook, etc.

It may become possible to calculatin the 路径配置 in Python, after the Core phase and before the Main phase, which is one of the PEP 432 motivation.

The “Core” phase is not properly defined: what should be and what should not be available at this phase is not specified yet. The API is marked as private and provisional: the API can be modified or even be removed anytime until a proper public API is designed.

Example running Python code between “Core” and “Main” initialization phases:

void init_python(void)
{
    PyStatus status;
    PyConfig config;
    PyConfig_InitPythonConfig(&config);
    config._init_main = 0;
    /* ... customize 'config' configuration ... */
    status = Py_InitializeFromConfig(&config);
    PyConfig_Clear(&config);
    if (PyStatus_Exception(status)) {
        Py_ExitStatusException(status);
    }
    /* Use sys.stderr because sys.stdout is only created
       by _Py_InitializeMain() */
    int res = PyRun_SimpleString(
        "import sys; "
        "print('Run Python code before _Py_InitializeMain', "
               "file=sys.stderr)");
    if (res < 0) {
        exit(1);
    }
    /* ... put more configuration code here ... */
    status = _Py_InitializeMain();
    if (PyStatus_Exception(status)) {
        Py_ExitStatusException(status);
    }
}
						

内容表

• Python 初始化配置
  • PyWideStringList
  • PyStatus
  • PyPreConfig
  • 采用 PyPreConfig 预初始化
  • PyConfig
  • 采用 PyConfig 初始化
  • 隔离配置
  • Python 配置
  • 路径配置
  • Py_RunMain()
  • 多阶段初始化私有暂行 API

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