全局配置变量

Python has variables for the global configuration to control different features and options. By default, these flags are controlled by command line options.

When a flag is set by an option, the value of the flag is the number of times that the option was set. For example, -b sets Py_BytesWarningFlag to 1 and -bb sets Py_BytesWarningFlag to 2.

int Py_BytesWarningFlag

Issue a warning when comparing bytes or bytearray with str or bytes with int. Issue an error if greater or equal to 2.

由 -b 选项设置。

int Py_DebugFlag

Turn on parser debugging output (for expert only, depending on compilation options).

Set by the -d option and the PYTHONDEBUG environment variable.

int Py_DontWriteBytecodeFlag

If set to non-zero, Python won’t try to write .pyc files on the import of source modules.

Set by the -B option and the PYTHONDONTWRITEBYTECODE environment variable.

int Py_FrozenFlag

Suppress error messages when calculating the module search path in Py_GetPath().

Private flag used by _freeze_importlib and frozenmain programs.

int Py_HashRandomizationFlag

Set to 1 if the PYTHONHASHSEED environment variable is set to a non-empty string.

If the flag is non-zero, read the PYTHONHASHSEED environment variable to initialize the secret hash seed.

int Py_IgnoreEnvironmentFlag

忽略所有 PYTHON* 环境变量，例如可能已设置的 PYTHONPATH 和 PYTHONHOME。

由 -E 和 -I 选项设置。

int Py_InspectFlag

When a script is passed as first argument or the -c option is used, enter interactive mode after executing the script or the command, even when sys.stdin does not appear to be a terminal.

Set by the -i option and the PYTHONINSPECT environment variable.

int Py_InteractiveFlag

由 -i 选项设置。

int Py_IsolatedFlag

Run Python in isolated mode. In isolated mode sys.path contains neither the script’s directory nor the user’s site-packages directory.

由 -I 选项设置。

3.4 新版功能.

int Py_LegacyWindowsFSEncodingFlag

If the flag is non-zero, use the mbcs encoding instead of the UTF-8 encoding for the filesystem encoding.

Set to 1 if the PYTHONLEGACYWINDOWSFSENCODING environment variable is set to a non-empty string.

有关更多详细信息，请参阅 PEP 529。

可用性: Windows。

int Py_LegacyWindowsStdioFlag

If the flag is non-zero, use io.FileIO instead of WindowsConsoleIO for sys standard streams.

Set to 1 if the PYTHONLEGACYWINDOWSSTDIO environment variable is set to a non-empty string.

有关更多详细信息，请参阅 PEP 528。

可用性: Windows。

int Py_NoSiteFlag

禁用 site 的导入及其所附带的基于站点对 sys.path 的操作。 如果 site 会在稍后被显式地导入也会禁用这些操作 (如果你希望触发它们则应调用 site.main())。

由 -S 选项设置。

int Py_NoUserSiteDirectory

不要将 用户 site-packages 目录 添加到 sys.path。

Set by the -s and -I options, and the PYTHONNOUSERSITE environment variable.

int Py_OptimizeFlag

Set by the -O option and the PYTHONOPTIMIZE environment variable.

int Py_QuietFlag

即使在交互模式下也不显示版权和版本信息。

由 -q 选项设置。

3.2 新版功能.

int Py_UnbufferedStdioFlag

Force the stdout and stderr streams to be unbuffered.

Set by the -u option and the PYTHONUNBUFFERED environment variable.

int Py_VerboseFlag

Print a message each time a module is initialized, showing the place (filename or built-in module) from which it is loaded. If greater or equal to 2, print a message for each file that is checked for when searching for a module. Also provides information on module cleanup at exit.

Set by the -v option and the PYTHONVERBOSE environment variable.