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Description:

pnulibpnu 1.3.0

Installation
This library will be installed as a dependency by other PNU utilities.
LibPNU(3)
NAME
libpnu — Common utility functions for the PNU project
SYNOPSIS
import libpnu
libpnu.initialize_debugging(String program_name)
libpnu.handle_interrupt_signals(Function handler_function)
libpnu.interrupt_handler_function(Int signal_number, FrameObject current_stack_frame)
String libpnu.get_home_directory()
String libpnu.get_caching_directory(String name)
List libpnu.locate_directory(String directory)
List libpnu.load_strings_from_file(String filename)
DESCRIPTION
The initialize_debugging() function sets up the Python logging module with a syslog style kind of console log using program_name as the program name.
By default, the logging level is set at WARNING or more, but can be lowered by calling logging.disable(),
for example with the logging.NOTSET parameter to get DEBUG or more logging level.
The handle_interrupt_signals() function calls the specified handler_function to process the SIGINT and SIGPIPE signals,
usually to avoid an ugly trace dump to the console in case of interrupt (Control-C pressed or broken pipe).
If all you want is printing an "Interrupted" English message and exit your program,
then you can use the interrupt_handler_function() as the handler_function.
The get_home_directory() function returns the location of the user's home directory in a string
depending on the operating system used (Unix, Windows).
The get_caching_directory() function returns the location of a user writable directory for caching files in a string
depending on the operating system used (Unix, Windows).
The provided name will be the last directory part of this location.
The locate_directory() function searches the specified directory in a variety of possible other directories,
depending on the operating system used (Unix, Windows) and the fact that a package can be user or system installed.
It is intended to be used when the directory can't be directly found, and returns a list of paths where the directory searched has been found.
For example, if the argument is "/usr/local/etc/man.d", we'll search for "usr/local/etc/man.d", "local/etc/man.d", "etc/man.d" (more likely) and "man.d"
in a list of user's local Python package directories
("HOME/.local"onUnix,"APPDATA/python", "HOMEPATH/appdata/roaming/python","USERPROFILE/appdata/roaming/python" on Windows)
and system wide Python package base directories (given by sys.base_prefix: "/usr/local" on Unix, "C:/Program Files/Python3x" on Windows).
The load_strings_from_file() function returns a list of strings from the given filename,
filtering out comments and empty lines (with '#' being the comment character),
and joining continued lines (those ending with a '\' character).
ENVIRONMENT
The following environment variables can be used to identify the user identity and home directory,
or find a caching directory.
On Unix: HOME, LNAME, LOGNAME, TMP, TMPDIR, USER and USERNAME.
On Windows: APPDATA, HOME, HOMEPATH, LOCALAPPDATA, TMP and USERPROFILE.
STANDARDS
The libpnu library is not a standard UNIX one.
It tries to follow the PEP 8 style guide for Python code.
PORTABILITY
Tested OK under Windows.
Packaged for FreeBSD as pyXX-pnu-libpnu.
HISTORY
This library was made for the PNU project.
LICENSE
It is available under the 3-clause BSD license.
AUTHORS
Hubert Tournier