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- """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 to the module search path. On
- Unix, 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 (mainly Mac and Windows), it uses just sys.prefix
- (and sys.exec_prefix, if different, but this is unlikely). The
- resulting directories, if they exist, are appended to sys.path, and
- also inspected for path configuration files.
-
- 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/python1.5/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/python1.5/site-packages/bar
- /usr/local/lib/python1.5/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, os
-
-
- def makepath(*paths):
- dir = os.path.abspath(os.path.join(*paths))
- return dir, os.path.normcase(dir)
-
- for m in sys.modules.values():
- if hasattr(m, "__file__") and m.__file__:
- m.__file__ = os.path.abspath(m.__file__)
- del m
-
- # This ensures that the initial path provided by the interpreter contains
- # only absolute pathnames, even if we're running from the build directory.
- L = []
- _dirs_in_sys_path = {}
- for dir in sys.path:
- # Filter out paths that don't exist, but leave in the empty string
- # since it's a special case. We also need to special-case the Mac,
- # as file names are allowed on sys.path there.
- if sys.platform != 'mac':
- if dir and not os.path.isdir(dir):
- continue
- else:
- if dir and not os.path.exists(dir):
- continue
- dir, dircase = makepath(dir)
- if not _dirs_in_sys_path.has_key(dircase):
- L.append(dir)
- _dirs_in_sys_path[dircase] = 1
- sys.path[:] = L
- del dir, L
-
- # Append ./build/lib.<platform> in case we're running in the build dir
- # (especially for Guido :-)
- if (os.name == "posix" and sys.path and
- os.path.basename(sys.path[-1]) == "Modules"):
- from distutils.util import get_platform
- s = "build/lib.%s-%.3s" % (get_platform(), sys.version)
- s = os.path.join(os.path.dirname(sys.path[-1]), s)
- sys.path.append(s)
- del get_platform, s
-
- def _init_pathinfo():
- global _dirs_in_sys_path
- _dirs_in_sys_path = d = {}
- for dir in sys.path:
- if dir and not os.path.isdir(dir):
- continue
- dir, dircase = makepath(dir)
- d[dircase] = 1
-
- def addsitedir(sitedir):
- global _dirs_in_sys_path
- if _dirs_in_sys_path is None:
- _init_pathinfo()
- reset = 1
- else:
- reset = 0
- sitedir, sitedircase = makepath(sitedir)
- if not _dirs_in_sys_path.has_key(sitedircase):
- sys.path.append(sitedir) # Add path component
- try:
- names = os.listdir(sitedir)
- except os.error:
- return
- names.sort()
- for name in names:
- if name[-4:] == os.extsep + "pth":
- addpackage(sitedir, name)
- if reset:
- _dirs_in_sys_path = None
-
- def addpackage(sitedir, name):
- global _dirs_in_sys_path
- if _dirs_in_sys_path is None:
- _init_pathinfo()
- reset = 1
- else:
- reset = 0
- fullname = os.path.join(sitedir, name)
- try:
- f = open(fullname)
- except IOError:
- return
- while 1:
- dir = f.readline()
- if not dir:
- break
- if dir[0] == '#':
- continue
- if dir.startswith("import"):
- exec dir
- continue
- if dir[-1] == '\n':
- dir = dir[:-1]
- dir, dircase = makepath(sitedir, dir)
- if not _dirs_in_sys_path.has_key(dircase) and os.path.exists(dir):
- sys.path.append(dir)
- _dirs_in_sys_path[dircase] = 1
- if reset:
- _dirs_in_sys_path = None
-
- prefixes = [sys.prefix]
- if sys.exec_prefix != sys.prefix:
- prefixes.append(sys.exec_prefix)
- for prefix in prefixes:
- if prefix:
- if 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")]
- for sitedir in sitedirs:
- if os.path.isdir(sitedir):
- addsitedir(sitedir)
-
- _dirs_in_sys_path = None
-
-
- # Define new built-ins 'quit' and 'exit'.
- # These are simply strings that display a hint on how to exit.
- if os.sep == ':':
- exit = 'Use Cmd-Q to quit.'
- elif os.sep == '\\':
- exit = 'Use Ctrl-Z plus Return to exit.'
- else:
- exit = 'Use Ctrl-D (i.e. EOF) to exit.'
- import __builtin__
- __builtin__.quit = __builtin__.exit = exit
- del exit
-
- # interactive prompt objects for printing the license text, a list of
- # contributors and the copyright notice.
- class _Printer:
- MAXLINES = 23
-
- def __init__(self, name, data, files=(), dirs=()):
- self.__name = name
- self.__data = data
- self.__files = files
- self.__dirs = dirs
- self.__lines = None
-
- def __setup(self):
- if self.__lines:
- return
- data = None
- for dir in self.__dirs:
- for file in self.__files:
- file = os.path.join(dir, file)
- try:
- fp = open(file)
- data = fp.read()
- fp.close()
- break
- except IOError:
- pass
- if data:
- break
- if not data:
- data = self.__data
- self.__lines = data.split('\n')
- self.__linecnt = len(self.__lines)
-
- def __repr__(self):
- self.__setup()
- if len(self.__lines) <= self.MAXLINES:
- return "\n".join(self.__lines)
- else:
- return "Type %s() to see the full %s text" % ((self.__name,)*2)
-
- def __call__(self):
- self.__setup()
- prompt = 'Hit Return for more, or q (and Return) to quit: '
- lineno = 0
- while 1:
- try:
- for i in range(lineno, lineno + self.MAXLINES):
- print self.__lines[i]
- except IndexError:
- break
- else:
- lineno += self.MAXLINES
- key = None
- while key is None:
- key = raw_input(prompt)
- if key not in ('', 'q'):
- key = None
- if key == 'q':
- break
-
- __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, Digital Creations and a cast of thousands
- 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])
-
-
- # Define new built-in 'help'.
- # This is a wrapper around pydoc.help (with a twist).
-
- class _Helper:
- def __repr__(self):
- return "Type help() for interactive help, " \
- "or help(object) for help about object."
- def __call__(self, *args, **kwds):
- import pydoc
- return pydoc.help(*args, **kwds)
-
- __builtin__.help = _Helper()
-
-
- # 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" # Default value set by _PyUnicode_Init()
-
- if 0:
- # Enable to support locale aware default string encodings.
- import locale
- loc = locale.getdefaultlocale()
- if loc[1]:
- encoding = loc[1]
-
- if 0:
- # Enable to switch off string to Unicode coercion and implicit
- # Unicode to string conversion.
- encoding = "undefined"
-
- if encoding != "ascii":
- # On Non-Unicode builds this will raise an AttributeError...
- sys.setdefaultencoding(encoding) # Needs Python Unicode build !
-
- #
- # Run custom site specific code, if available.
- #
- try:
- import sitecustomize
- except ImportError:
- pass
-
- #
- # Remove sys.setdefaultencoding() so that users cannot change the
- # encoding after initialization. The test for presence is needed when
- # this module is run as a script, because this code is executed twice.
- #
- if hasattr(sys, "setdefaultencoding"):
- del sys.setdefaultencoding
-
- def _test():
- print "sys.path = ["
- for dir in sys.path:
- print " %s," % `dir`
- print "]"
-
- if __name__ == '__main__':
- _test()
-