Class RegistryKey

Field Details

• PYTHON_CACHEDIR

  public static final String PYTHON_CACHEDIR

  python.cachedir defines the directory to use for caches (currently just package information). This directory should be writable by the user. If this is an absolute path it is used as given, otherwise it is interpreted relative to sys.prefix (typically the directory of this file).

  See Also:

  • Constant Field Values

• PYTHON_CACHEDIR_SKIP

  public static final String PYTHON_CACHEDIR_SKIP

  Setting python.cachedir.skip to true disables the package scan for the cachedir (as defined by python.cachedir or a default). Please be aware that disabling this will break importing from java packages.

  See Also:

  • Constant Field Values

• PYTHON_CPYTHON

  public static final String PYTHON_CPYTHON

  python.cpython2 is the name of a CPython executable, version 2.7.

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  • Constant Field Values

• PYTHON_DIVISION_WARNING

  public static final String PYTHON_DIVISION_WARNING

  python.division.warning will print deprecation warnings when doing forced floor rounding with the / division operator.

  "3/2" equals 1 in Python 2.x (forced floor rounding) and 1.5 in Python 3 (convert ints to floats). This is equivalent to -Qwarn on the command line. See PEP 238.

  Values: old, warn, warnall.

  This property will be deprecated and removed in 3.x.

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  • Constant Field Values

• PYTHON_CONSOLE

  public static final String PYTHON_CONSOLE

  python.console names the class used for the Jython console. Jython ships with a JLine console (http://jline.sourceforge.net/) out of the box. This is selected by default in the Jython command-line application (jython) if you do not define python.console to be another class on the command line. Alternatively, you can set python.console in the registry, but be aware that this will also affect the console in applications that embed a PythonInterpreter, or use Jython as a JSR-223 script engine.

  Values for python.console

  JLineConsole (default)

  PlainConsole (featureless)

  You may also set this to the name of a different console class in your classpath that extends PlainConsole. Note that org.python.util.ReadlineConsole has been removed in 2.7.

  See Also:

  • Constant Field Values

• PYTHON_CONSOLE_ENCODING

  public static final String PYTHON_CONSOLE_ENCODING

  python.console.encoding is the encoding used reading commands from the console. Must be a valid Java codec name, such as cp850.

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  • Constant Field Values

• PYTHON_IMPORT_SITE

  public static final String PYTHON_IMPORT_SITE

  python.import.site controls whether to import site.py. Boolean.

  Equivalent to -S on the command line.

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  • Constant Field Values

• PYTHON_INSPECT

  public static final String PYTHON_INSPECT

  When python.inspect is set, and a script given on the command line finishes, start an interactive interpreter. Any non-empty string value will enable this behaviour.

  Equivalent to the -i option on the command-line, or The session only actually starts if the console is interactive.

  See Also:

  • Constant Field Values

• PYTHON_IO_ENCODING

  public static final String PYTHON_IO_ENCODING

  python.io.encoding controls the encoding of sys.stdin, sys.stdout, and sys.stderr. The encoding must name a Python codec, as in codecs.encode().

  See Also:

  • Constant Field Values

• PYTHON_IO_ERRORS

  public static final String PYTHON_IO_ERRORS

  python.io.errors is the unicode error handler for I/O encoding problems.

  See Also:

  • Constant Field Values

• PYTHON_LOCALE_CONTROL

  public static final String PYTHON_LOCALE_CONTROL

  python.locale.control determines locale module behaviour, including enabling locale module support, currently in beta.

  Values:

  Values for python.locale.control

  settable	Python locale module is available and supports setlocale() and other standard functions. This will be the default in a future Jython version.
  jython2_legacy (default)	Mix of implicit Java locale and emulated 'C' locale behaviour, consistent with behaviour in Jython 2.7.1 and earlier. Will be deprecated in a future Jython version.

  More detail can be found in the documentation for the locale module and the underlying platform services exposed in _locale.

  See Also:

  • Constant Field Values

• PYTHON_MODULES_BUILTIN

  public static final String PYTHON_MODULES_BUILTIN

  python.modules.builtin controls the list of builtin modules; you can add, remove, or override builtin modules. The value for this registry key is a comma separated list of module entries, each entry of which has the following allowable forms:

  Values for python.modules.builtin

  name	The module name is name and the class name is org.python.modules.name
  name:class	The module name is name and the class name is class where class must be a fully qualified Java class name
  name:null	The module name is removed from the list of builtin modules

  A good example would be to use a jni version of os for more functionality by having an entry such as os:com.foo.jni.os

  See Also:

  • Constant Field Values

• PYTHON_OPTIONS_CASE_OK

  public static final String PYTHON_OPTIONS_CASE_OK

  If python.options.caseok is true, Jython will use the first module found on sys.path where java File.isFile() returns true. Setting this will have no effect on unix-type filesystems. On Windows/HFS+ systems setting it to true will enable Jython-2.0 behaviour.

  See Also:

  • Constant Field Values

• PYTHON_OPTIONS_INCLUDE_JAVA_STACK_IN_EXCEPTIONS

  public static final String PYTHON_OPTIONS_INCLUDE_JAVA_STACK_IN_EXCEPTIONS

  python.options.includeJavaStackInExceptions controls whether exceptions raised from Python code will include a Java stack trace in addition to the Python traceback. This can slow raising considerably. Boolean, true by default.

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  • Constant Field Values

• PYTHON_OPTIONS_SHOW_JAVA_EXCEPTIONS

  public static final String PYTHON_OPTIONS_SHOW_JAVA_EXCEPTIONS

  When an exception occurs in Java code, and it is not caught, python.options.showJavaExceptions controls whether the interpreter prints out the Java exception in the traceback. Boolean, false by default.

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  • Constant Field Values

• PYTHON_OPTIONS_SHOW_PYTHON_PROXY_EXCEPTIONS

  public static final String PYTHON_OPTIONS_SHOW_PYTHON_PROXY_EXCEPTIONS

  When python.options.showPythonProxyExceptions is true, python exceptions raised in overridden methods will be shown on stderr.

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  • Constant Field Values

• PYTHON_OPTIONS_PROXY_DEBUG_DIRECTORY

  public static final String PYTHON_OPTIONS_PROXY_DEBUG_DIRECTORY

  python.options.proxyDebugDirectory is the directory where dynamically generated classes are written. Nothing is ever read from here, it is only for debugging purposes.

  See Also:

  • Constant Field Values

• PYTHON_OPTIONS_Q_NEW

  public static final String PYTHON_OPTIONS_Q_NEW

  python.options.Qnew controls whether true division is enabled for the / operator. See PEP 238. Boolean.

  Equivalent to -Qnew on the command line.

  See Also:

  • Constant Field Values

• PYTHON_OS

  public static final String PYTHON_OS

  python.os defines the string used to report the underlying operating system. Used as prefix when resolving which operating system, impacting some OS-specific behaviour.

  See Also:

  • Constant Field Values

• PYTHON_PACKAGES_FAKEPATH

  public static final String PYTHON_PACKAGES_FAKEPATH

  python.packages.fakepath defines a sequence of directories and JARs that are to be sources of Python packages.

  See Also:

  • Constant Field Values

• PYTHON_PACKAGES_PATHS

  public static final String PYTHON_PACKAGES_PATHS

  python.packages.paths defines a sequence of property names. Each property is a path string. The default setting causes directories and JARs on the classpath and in the JRE (before Java 9) to be sources of Python packages.

  See Also:

  • Constant Field Values

• PYTHON_PACKAGES_DIRECTORIES

  public static final String PYTHON_PACKAGES_DIRECTORIES

  python.packages.directories defines a sequence of property names. Each property name is a path string, in which the elements are directories. Each directory contains JAR/ZIP files that are to be a source of Python packages. By default, these directories are those where the JVM stores its optional packages as JARs (a mechanism withdrawn in Java 9).

  See Also:

  • Constant Field Values

• PYTHON_PATH

  public static final String PYTHON_PATH

  python.path is the search path for Python modules, equivalent to CPython's PYTHONPATH environment variable.

  See Also:

  • Constant Field Values

• PYTHON_SECURITY_RESPECT_JAVA_ACCESSIBILITY

  public static final String PYTHON_SECURITY_RESPECT_JAVA_ACCESSIBILITY

  If python.security.respectJavaAccessibility is false, and you are using a Java version before Java 9, then Jython can access non-public fields, methods, and constructors. Normally, Jython can only provide access to public members of classes.

  This may be deprecated in the future due to Java changes to accessibility from version 9 (at least for Oracle JDK and OpenJDK). See documentation on the --illegal-access (new) and --permit-illegal-access java command line flags for more detail.

  Boolean.

  See Also:

  • Constant Field Values

• PYTHON_SRE_CACHESPEC

  public static final String PYTHON_SRE_CACHESPEC

  python.sre.cachespec is the specification for the SRE_STATE code point cache used by regular expressions. The spec string is in the comma separated key=value format of com.google.common.cache.CacheBuilder, within guava (which is also the source of the cache implementation).

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  • Constant Field Values

• PYTHON_STARTUP

  public static final String PYTHON_STARTUP

  python.startup is the name of a file to be run at the start of each interactive session, but not when dropping in with the -i flag in after a script has run.

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  • Constant Field Values

• PYTHON_VERBOSE

  public static final String PYTHON_VERBOSE

  python.verbose sets the verbosity level for varying degrees of informative messages. Valid values in order of increasing verbosity are error, warning, message, comment, debug.

  See Also:

  • Constant Field Values

• USER_HOME

  public static final String USER_HOME

  user.home sets the user home directory.

  See Also:

  • Constant Field Values