Personal Computer World 2009 February/PCWFEB09.iso/Software/Linux/Kubuntu 8.10/kubuntu-8.10-desktop-i386.iso/casper/filesystem.squashfs/usr/lib/python2.5/site.pyc

Python Compiled Bytecode | 2008-10-29 | 14KB | 479 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 2.5)

"""Append module search paths for third-party packages to sys.path.

****************************************************************
* This module is automatically imported during initialization. *
****************************************************************

In earlier versions of Python (up to 1.5a3), scripts or modules that
needed to use site-specific modules would place ``import site''
somewhere near the top of their code.  Because of the automatic
import, this is no longer necessary (but code that does it still
works).

This will append site-specific paths to the module search path.  On
Unix (including Mac OSX), it starts with sys.prefix and
sys.exec_prefix (if different) and appends
lib/python<version>/site-packages as well as lib/site-python.
On other platforms (such as Windows), it tries each of the
prefixes directly, as well as with lib/site-packages appended.  The
resulting directories, if they exist, are appended to sys.path, and
also inspected for path configuration files.

FOR DEBIAN, this sys.path is augmented with directories in /usr/local.
Local addons go into /usr/local/lib/python<version>/site-packages
(resp. /usr/local/lib/site-python), Debian addons install into
/usr/lib/python<version>/site-packages.

A path configuration file is a file whose name has the form
<package>.pth; its contents are additional directories (one per line)
to be added to sys.path.  Non-existing directories (or
non-directories) are never added to sys.path; no directory is added to
sys.path more than once.  Blank lines and lines beginning with
'#' are skipped. Lines starting with 'import' are executed.

For example, suppose sys.prefix and sys.exec_prefix are set to
/usr/local and there is a directory /usr/local/lib/python2.5/site-packages
with three subdirectories, foo, bar and spam, and two path
configuration files, foo.pth and bar.pth.  Assume foo.pth contains the
following:

  # foo package configuration
  foo
  bar
  bletch

and bar.pth contains:

  # bar package configuration
  bar

Then the following directories are added to sys.path, in this order:

  /usr/local/lib/python2.5/site-packages/bar
  /usr/local/lib/python2.5/site-packages/foo

Note that bletch is omitted because it doesn't exist; bar precedes foo
because bar.pth comes alphabetically before foo.pth; and spam is
omitted because it is not mentioned in either path configuration file.

After these path manipulations, an attempt is made to import a module
named sitecustomize, which can perform arbitrary additional
site-specific customizations.  If this import fails with an
ImportError exception, it is silently ignored.

"""
import sys
import os
import __builtin__

def makepath(*paths):
    dir = os.path.abspath(os.path.join(*paths))
    return (dir, os.path.normcase(dir))


def abs__file__():
    """Set all module' __file__ attribute to an absolute path"""
    for m in sys.modules.values():
        if hasattr(m, '__loader__'):
            continue


        try:
            m.__file__ = os.path.abspath(m.__file__)
        continue
        except AttributeError:
            continue
            continue





def removeduppaths():
    ''' Remove duplicate entries from sys.path along with making them
    absolute'''
    L = []
    known_paths = set()
    for dir in sys.path:
        (dir, dircase) = makepath(dir)
        if dircase not in known_paths:
            L.append(dir)
            known_paths.add(dircase)
            continue

    sys.path[:] = L
    return known_paths


def _init_pathinfo():
    '''Return a set containing all existing directory entries from sys.path'''
    d = set()
    for dir in sys.path:

        try:
            if os.path.isdir(dir):
                (dir, dircase) = makepath(dir)
                d.add(dircase)
        continue
        except TypeError:
            continue
            continue



    return d


def addpackage(sitedir, name, known_paths):
    """Add a new path to known_paths by combining sitedir and 'name' or execute
    sitedir if it starts with 'import'"""
    if known_paths is None:
        _init_pathinfo()
        reset = 1
    else:
        reset = 0
    fullname = os.path.join(sitedir, name)

    try:
        f = open(fullname, 'rU')
    except IOError:
        return None


    try:
        for line in f:
            if line.startswith('#'):
                continue

            if line.startswith('import'):
                exec line
                continue

            line = line.rstrip()
            (dir, dircase) = makepath(sitedir, line)
            if dircase not in known_paths and os.path.exists(dir):
                sys.path.append(dir)
                known_paths.add(dircase)
                continue
    finally:
        f.close()

    if reset:
        known_paths = None

    return known_paths


def addsitedir(sitedir, known_paths = None):
    """Add 'sitedir' argument to sys.path if missing and handle .pth files in
    'sitedir'"""
    if known_paths is None:
        known_paths = _init_pathinfo()
        reset = 1
    else:
        reset = 0
    (sitedir, sitedircase) = makepath(sitedir)
    if sitedircase not in known_paths:
        sys.path.append(sitedir)


    try:
        names = os.listdir(sitedir)
    except os.error:
        return None

    names.sort()
    for name in names:
        if name.endswith(os.extsep + 'pth'):
            addpackage(sitedir, name, known_paths)
            continue

    if reset:
        known_paths = None

    return known_paths


def addsitepackages(known_paths):
    '''Add site-packages (and possibly site-python) to sys.path'''
    prefixes = [
        sys.prefix]
    if sys.exec_prefix != sys.prefix:
        prefixes.append(sys.exec_prefix)

    prefixes.insert(0, '/usr/local')
    for prefix in prefixes:
        if prefix:
            if sys.platform in ('os2emx', 'riscos'):
                sitedirs = [
                    os.path.join(prefix, 'Lib', 'site-packages')]
            elif os.sep == '/':
                sitedirs = [
                    os.path.join(prefix, 'lib', 'python' + sys.version[:3], 'site-packages'),
                    os.path.join(prefix, 'lib', 'site-python')]
            else:
                sitedirs = [
                    prefix,
                    os.path.join(prefix, 'lib', 'site-packages')]
            if sys.platform == 'darwin':
                if 'Python.framework' in prefix:
                    home = os.environ.get('HOME')
                    if home:
                        sitedirs.append(os.path.join(home, 'Library', 'Python', sys.version[:3], 'site-packages'))



            for sitedir in sitedirs:
                if os.path.isdir(sitedir):
                    addsitedir(sitedir, known_paths)
                    continue




def setBEGINLIBPATH():
    '''The OS/2 EMX port has optional extension modules that do double duty
    as DLLs (and must use the .DLL file extension) for other extensions.
    The library search path needs to be amended so these will be found
    during module import.  Use BEGINLIBPATH so that these are at the start
    of the library search path.

    '''
    dllpath = os.path.join(sys.prefix, 'Lib', 'lib-dynload')
    libpath = os.environ['BEGINLIBPATH'].split(';')
    if libpath[-1]:
        libpath.append(dllpath)
    else:
        libpath[-1] = dllpath
    os.environ['BEGINLIBPATH'] = ';'.join(libpath)


def setquit():
    """Define new built-ins 'quit' and 'exit'.
    These are simply strings that display a hint on how to exit.

    """
    if os.sep == ':':
        eof = 'Cmd-Q'
    elif os.sep == '\\':
        eof = 'Ctrl-Z plus Return'
    else:
        eof = 'Ctrl-D (i.e. EOF)'

    class Quitter((object,)):

        def __init__(self, name):
            self.name = name


        def __repr__(self):
            return 'Use %s() or %s to exit' % (self.name, eof)


        def __call__(self, code = None):

            try:
                sys.stdin.close()
            except:
                pass

            raise SystemExit(code)


    __builtin__.quit = Quitter('quit')
    __builtin__.exit = Quitter('exit')


class _Printer(object):
    '''interactive prompt objects for printing the license text, a list of
    contributors and the copyright notice.'''
    MAXLINES = 23

    def __init__(self, name, data, files = (), dirs = ()):
        self._Printer__name = name
        self._Printer__data = data
        self._Printer__files = files
        self._Printer__dirs = dirs
        self._Printer__lines = None


    def _Printer__setup(self):
        if self._Printer__lines:
            return None

        data = None
        for dir in self._Printer__dirs:
            for filename in self._Printer__files:
                filename = os.path.join(dir, filename)

                try:
                    fp = file(filename, 'rU')
                    data = fp.read()
                    fp.close()
                continue
                except IOError:
                    continue



            if data:
                break
                continue
            None<EXCEPTION MATCH>IOError

        if not data:
            data = self._Printer__data

        self._Printer__lines = data.split('\n')
        self._Printer__linecnt = len(self._Printer__lines)


    def __repr__(self):
        self._Printer__setup()
        if len(self._Printer__lines) <= self.MAXLINES:
            return '\n'.join(self._Printer__lines)
        else:
            return 'Type %s() to see the full %s text' % (self._Printer__name,) * 2


    def __call__(self):
        self._Printer__setup()
        prompt = 'Hit Return for more, or q (and Return) to quit: '
        lineno = 0
        while None:

            try:
                for i in range(lineno, lineno + self.MAXLINES):
                    print self._Printer__lines[i]
            except IndexError:
                break
                continue

            lineno += self.MAXLINES
            key = None
            while key is None:
                key = raw_input(prompt)
                if key not in ('', 'q'):
                    key = None
                    continue
            if key == 'q':
                break
                continue
            continue
            return None



def setcopyright():
    """Set 'copyright' and 'credits' in __builtin__"""
    __builtin__.copyright = _Printer('copyright', sys.copyright)
    if sys.platform[:4] == 'java':
        __builtin__.credits = _Printer('credits', 'Jython is maintained by the Jython developers (www.jython.org).')
    else:
        __builtin__.credits = _Printer('credits', '    Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands\n    for supporting Python development.  See www.python.org for more information.')
    here = os.path.dirname(os.__file__)
    __builtin__.license = _Printer('license', 'See http://www.python.org/%.3s/license.html' % sys.version, [
        'LICENSE.txt',
        'LICENSE'], [
        os.path.join(here, os.pardir),
        here,
        os.curdir])


class _Helper(object):
    """Define the built-in 'help'.
    This is a wrapper around pydoc.help (with a twist).

    """

    def __repr__(self):
        return 'Type help() for interactive help, or help(object) for help about object.'


    def __call__(self, *args, **kwds):
        import pydoc as pydoc
        return pydoc.help(*args, **kwds)



def sethelper():
    __builtin__.help = _Helper()


def aliasmbcs():
    '''On Windows, some default encodings are not provided by Python,
    while they are always available as "mbcs" in each locale. Make
    them usable by aliasing to "mbcs" in such a case.'''
    if sys.platform == 'win32':
        import locale as locale
        import codecs as codecs
        enc = locale.getdefaultlocale()[1]
        if enc.startswith('cp'):

            try:
                codecs.lookup(enc)
            except LookupError:
                import encodings as encodings
                encodings._cache[enc] = encodings._unknown
                encodings.aliases.aliases[enc] = 'mbcs'
            except:
                None<EXCEPTION MATCH>LookupError


        None<EXCEPTION MATCH>LookupError



def setencoding():
    """Set the string encoding used by the Unicode implementation.  The
    default is 'ascii', but if you're willing to experiment, you can
    change this."""
    encoding = 'ascii'
    if encoding != 'ascii':
        sys.setdefaultencoding(encoding)



def execsitecustomize():
    '''Run custom site specific code, if available.'''

    try:
        import sitecustomize as sitecustomize
    except ImportError:
        pass



def main():
    abs__file__()
    paths_in_sys = removeduppaths()
    paths_in_sys = addsitepackages(paths_in_sys)
    if sys.platform == 'os2emx':
        setBEGINLIBPATH()

    setquit()
    setcopyright()
    sethelper()
    aliasmbcs()
    setencoding()
    execsitecustomize()
    if hasattr(sys, 'setdefaultencoding'):
        del sys.setdefaultencoding


main()

def _test():
    print 'sys.path = ['
    for dir in sys.path:
        print '    %r,' % (dir,)

    print ']'

if __name__ == '__main__':
    _test()