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

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****************************************************************

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* This module is automatically imported during initialization. *

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****************************************************************

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This will append site-specific paths to the module search path. On

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Unix (including Mac OSX), it starts with sys.prefix and

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sys.exec_prefix (if different) and appends

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lib/python<version>/site-packages.

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On other platforms (such as Windows), it tries each of the

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prefixes directly, as well as with lib/site-packages appended. The

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resulting directories, if they exist, are appended to sys.path, and

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also inspected for path configuration files.

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If a file named "pyvenv.cfg" exists one directory above sys.executable,

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sys.prefix and sys.exec_prefix are set to that directory and

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it is also checked for site-packages (sys.base_prefix and

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sys.base_exec_prefix will always be the "real" prefixes of the Python

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installation). If "pyvenv.cfg" (a bootstrap configuration file) contains

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the key "include-system-site-packages" set to anything other than "false"

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(case-insensitive), the system-level prefixes will still also be

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searched for site-packages; otherwise they won't.

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All of the resulting site-specific directories, if they exist, are

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appended to sys.path, and also inspected for path configuration

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files.

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A path configuration file is a file whose name has the form

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<package>.pth; its contents are additional directories (one per line)

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to be added to sys.path. Non-existing directories (or

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non-directories) are never added to sys.path; no directory is added to

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sys.path more than once. Blank lines and lines beginning with

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'#' are skipped. Lines starting with 'import' are executed.

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For example, suppose sys.prefix and sys.exec_prefix are set to

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/usr/local and there is a directory /usr/local/lib/python2.5/site-packages

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with three subdirectories, foo, bar and spam, and two path

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configuration files, foo.pth and bar.pth. Assume foo.pth contains the

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following:

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# foo package configuration

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foo

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bar

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bletch

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and bar.pth contains:

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# bar package configuration

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bar

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

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

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

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Note that bletch is omitted because it doesn't exist; bar precedes foo

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because bar.pth comes alphabetically before foo.pth; and spam is

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omitted because it is not mentioned in either path configuration file.

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The readline module is also automatically configured to enable

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completion for systems that support it. This can be overridden in

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sitecustomize, usercustomize or PYTHONSTARTUP. Starting Python in

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isolated mode (-I) disables automatic readline configuration.

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After these operations, an attempt is made to import a module

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named sitecustomize, which can perform arbitrary additional

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site-specific customizations. If this import fails with an

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ImportError exception, it is silently ignored.

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"""

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import sys

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import os

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import builtins

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import _sitebuiltins

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import io

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# Prefixes for site-packages; add additional prefixes like /usr/local here

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PREFIXES = [sys.prefix, sys.exec_prefix]

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# Enable per user site-packages directory

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# set it to False to disable the feature or True to force the feature

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ENABLE_USER_SITE = None

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# for distutils.commands.install

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# These values are initialized by the getuserbase() and getusersitepackages()

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# functions, through the main() function when Python starts.

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USER_SITE = None

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USER_BASE = None

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def makepath(*paths):

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dir = os.path.join(*paths)

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try:

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dir = os.path.abspath(dir)

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except OSError:

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pass

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return dir, os.path.normcase(dir)

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def abs_paths():

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"""Set all module __file__ and __cached__ attributes to an absolute path"""

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for m in set(sys.modules.values()):

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if (getattr(getattr(m, '__loader__', None), '__module__', None) not in

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('_frozen_importlib', '_frozen_importlib_external')):

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continue # don't mess with a PEP 302-supplied __file__

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try:

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m.__file__ = os.path.abspath(m.__file__)

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except (AttributeError, OSError, TypeError):

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pass

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try:

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m.__cached__ = os.path.abspath(m.__cached__)

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except (AttributeError, OSError, TypeError):

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pass

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def removeduppaths():

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""" Remove duplicate entries from sys.path along with making them

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absolute"""

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# This ensures that the initial path provided by the interpreter contains

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# only absolute pathnames, even if we're running from the build directory.

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L = []

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known_paths = set()

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for dir in sys.path:

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# Filter out duplicate paths (on case-insensitive file systems also

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# if they only differ in case); turn relative paths into absolute

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# paths.

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dir, dircase = makepath(dir)

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if dircase not in known_paths:

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L.append(dir)

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known_paths.add(dircase)

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sys.path[:] = L

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return known_paths

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def _init_pathinfo():

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"""Return a set containing all existing file system items from sys.path."""

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d = set()

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for item in sys.path:

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try:

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if os.path.exists(item):

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_, itemcase = makepath(item)

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d.add(itemcase)

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except TypeError:

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continue

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return d

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def addpackage(sitedir, name, known_paths):

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"""Process a .pth file within the site-packages directory:

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For each line in the file, either combine it with sitedir to a path

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and add that to known_paths, or execute it if it starts with 'import '.

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"""

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if known_paths is None:

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known_paths = _init_pathinfo()

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reset = True

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else:

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reset = False

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fullname = os.path.join(sitedir, name)

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try:

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f = io.TextIOWrapper(io.open_code(fullname))

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except OSError:

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return

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with f:

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for n, line in enumerate(f):

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if line.startswith("#"):

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continue

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try:

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if line.startswith(("import ", "import\t")):

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exec(line)

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continue

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line = line.rstrip()

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dir, dircase = makepath(sitedir, line)

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if not dircase in known_paths and os.path.exists(dir):

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sys.path.append(dir)

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known_paths.add(dircase)

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except Exception:

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print("Error processing line {:d} of {}:\n".format(n+1, fullname),

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file=sys.stderr)

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import traceback

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for record in traceback.format_exception(*sys.exc_info()):

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for line in record.splitlines():

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print(' '+line, file=sys.stderr)

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print("\nRemainder of file ignored", file=sys.stderr)

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break

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if reset:

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known_paths = None

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return known_paths

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def addsitedir(sitedir, known_paths=None):

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"""Add 'sitedir' argument to sys.path if missing and handle .pth files in

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'sitedir'"""

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if known_paths is None:

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known_paths = _init_pathinfo()

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reset = True

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else:

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reset = False

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sitedir, sitedircase = makepath(sitedir)

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if not sitedircase in known_paths:

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sys.path.append(sitedir) # Add path component

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known_paths.add(sitedircase)

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try:

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names = os.listdir(sitedir)

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except OSError:

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return

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names = [name for name in names if name.endswith(".pth")]

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for name in sorted(names):

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addpackage(sitedir, name, known_paths)

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if reset:

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known_paths = None

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return known_paths

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def check_enableusersite():

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"""Check if user site directory is safe for inclusion

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The function tests for the command line flag (including environment var),

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process uid/gid equal to effective uid/gid.

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None: Disabled for security reasons

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False: Disabled by user (command line option)

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True: Safe and enabled

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"""

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if sys.flags.no_user_site:

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return False

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if hasattr(os, "getuid") and hasattr(os, "geteuid"):

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# check process uid == effective uid

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if os.geteuid() != os.getuid():

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return None

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if hasattr(os, "getgid") and hasattr(os, "getegid"):

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# check process gid == effective gid

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if os.getegid() != os.getgid():

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return None

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return True

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# NOTE: sysconfig and it's dependencies are relatively large but site module

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# needs very limited part of them.

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# To speedup startup time, we have copy of them.

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#

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# See https://bugs.python.org/issue29585

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# Copy of sysconfig._getuserbase()

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def _getuserbase():

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env_base = os.environ.get("PYTHONUSERBASE", None)

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if env_base:

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return env_base

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def joinuser(*args):

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return os.path.expanduser(os.path.join(*args))

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if os.name == "nt":

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base = os.environ.get("APPDATA") or "~"

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return joinuser(base, "Python")

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if sys.platform == "darwin" and sys._framework:

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return joinuser("~", "Library", sys._framework,

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"%d.%d" % sys.version_info[:2])

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return joinuser("~", ".local")

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# Same to sysconfig.get_path('purelib', os.name+'_user')

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def _get_path(userbase):

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version = sys.version_info

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if os.name == 'nt':

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return f'{userbase}\\Python{version[0]}{version[1]}\\site-packages'

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if sys.platform == 'darwin' and sys._framework:

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return f'{userbase}/lib/python/site-packages'

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return f'{userbase}/lib/python{version[0]}.{version[1]}/site-packages'

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def getuserbase():

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"""Returns the `user base` directory path.

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The `user base` directory can be used to store data. If the global

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variable ``USER_BASE`` is not initialized yet, this function will also set

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it.

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"""

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global USER_BASE

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if USER_BASE is None:

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USER_BASE = _getuserbase()

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return USER_BASE

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def getusersitepackages():

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"""Returns the user-specific site-packages directory path.

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If the global variable ``USER_SITE`` is not initialized yet, this

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function will also set it.

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"""

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global USER_SITE

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userbase = getuserbase() # this will also set USER_BASE

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if USER_SITE is None:

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USER_SITE = _get_path(userbase)

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return USER_SITE

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def addusersitepackages(known_paths):

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"""Add a per user site-package to sys.path

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Each user has its own python directory with site-packages in the

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home directory.

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"""

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# get the per user site-package path

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# this call will also make sure USER_BASE and USER_SITE are set

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user_site = getusersitepackages()

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if ENABLE_USER_SITE and os.path.isdir(user_site):

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addsitedir(user_site, known_paths)

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return known_paths

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def getsitepackages(prefixes=None):

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"""Returns a list containing all global site-packages directories.

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For each directory present in ``prefixes`` (or the global ``PREFIXES``),

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this function will find its `site-packages` subdirectory depending on the

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system environment, and will return a list of full paths.

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"""

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sitepackages = []

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seen = set()

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if prefixes is None:

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prefixes = PREFIXES

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for prefix in prefixes:

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if not prefix or prefix in seen:

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continue

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seen.add(prefix)

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libdirs = [sys.platlibdir]

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if sys.platlibdir != "lib":

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libdirs.append("lib")

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if os.sep == '/':

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for libdir in libdirs:

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path = os.path.join(prefix, libdir,

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"python%d.%d" % sys.version_info[:2],

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"site-packages")

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sitepackages.append(path)

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else:

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sitepackages.append(prefix)

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for libdir in libdirs:

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path = os.path.join(prefix, libdir, "site-packages")

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sitepackages.append(path)

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return sitepackages

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def addsitepackages(known_paths, prefixes=None):

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"""Add site-packages to sys.path"""

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for sitedir in getsitepackages(prefixes):

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if os.path.isdir(sitedir):

[357] Fix | Delete

addsitedir(sitedir, known_paths)

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return known_paths

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[361] Fix | Delete

def setquit():

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"""Define new builtins 'quit' and 'exit'.

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These are objects which make the interpreter exit when called.

[365] Fix | Delete

The repr of each object contains a hint at how it works.

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"""

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if os.sep == '\\':

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eof = 'Ctrl-Z plus Return'

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else:

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eof = 'Ctrl-D (i.e. EOF)'

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[373] Fix | Delete

builtins.quit = _sitebuiltins.Quitter('quit', eof)

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builtins.exit = _sitebuiltins.Quitter('exit', eof)

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def setcopyright():

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"""Set 'copyright' and 'credits' in builtins"""

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builtins.copyright = _sitebuiltins._Printer("copyright", sys.copyright)

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if sys.platform[:4] == 'java':

[381] Fix | Delete

builtins.credits = _sitebuiltins._Printer(

[382] Fix | Delete

"credits",

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"Jython is maintained by the Jython developers (www.jython.org).")

[384] Fix | Delete

else:

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builtins.credits = _sitebuiltins._Printer("credits", """\

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Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands

[387] Fix | Delete

for supporting Python development. See www.python.org for more information.""")

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files, dirs = [], []

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# Not all modules are required to have a __file__ attribute. See

[390] Fix | Delete

# PEP 420 for more details.

[391] Fix | Delete

if hasattr(os, '__file__'):

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here = os.path.dirname(os.__file__)

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files.extend(["LICENSE.txt", "LICENSE"])

[394] Fix | Delete

dirs.extend([os.path.join(here, os.pardir), here, os.curdir])

[395] Fix | Delete

builtins.license = _sitebuiltins._Printer(

[396] Fix | Delete

"license",

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"See https://www.python.org/psf/license/",

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files, dirs)

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[400] Fix | Delete

[401] Fix | Delete

def sethelper():

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builtins.help = _sitebuiltins._Helper()

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[404] Fix | Delete

def enablerlcompleter():

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"""Enable default readline configuration on interactive prompts, by

[406] Fix | Delete

registering a sys.__interactivehook__.

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[408] Fix | Delete

If the readline module can be imported, the hook will set the Tab key

[409] Fix | Delete

as completion key and register ~/.python_history as history file.

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This can be overridden in the sitecustomize or usercustomize module,

[411] Fix | Delete

or in a PYTHONSTARTUP file.

[412] Fix | Delete

"""

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def register_readline():

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import atexit

[415] Fix | Delete

try:

[416] Fix | Delete

import readline

[417] Fix | Delete

import rlcompleter

[418] Fix | Delete

except ImportError:

[419] Fix | Delete

return

[420] Fix | Delete

[421] Fix | Delete

# Reading the initialization (config) file may not be enough to set a

[422] Fix | Delete

# completion key, so we set one first and then read the file.

[423] Fix | Delete

readline_doc = getattr(readline, '__doc__', '')

[424] Fix | Delete

if readline_doc is not None and 'libedit' in readline_doc:

[425] Fix | Delete

readline.parse_and_bind('bind ^I rl_complete')

[426] Fix | Delete

else:

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readline.parse_and_bind('tab: complete')

[428] Fix | Delete

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try:

[430] Fix | Delete

readline.read_init_file()

[431] Fix | Delete

except OSError:

[432] Fix | Delete

# An OSError here could have many causes, but the most likely one

[433] Fix | Delete

# is that there's no .inputrc file (or .editrc file in the case of

[434] Fix | Delete

# Mac OS X + libedit) in the expected location. In that case, we

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# want to ignore the exception.

[436] Fix | Delete

pass

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[438] Fix | Delete

if readline.get_current_history_length() == 0:

[439] Fix | Delete

# If no history was loaded, default to .python_history.

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# The guard is necessary to avoid doubling history size at

[441] Fix | Delete

# each interpreter exit when readline was already configured

[442] Fix | Delete

# through a PYTHONSTARTUP hook, see:

[443] Fix | Delete

# http://bugs.python.org/issue5845#msg198636

[444] Fix | Delete

history = os.path.join(os.path.expanduser('~'),

[445] Fix | Delete

'.python_history')

[446] Fix | Delete

try:

[447] Fix | Delete

readline.read_history_file(history)

[448] Fix | Delete

except OSError:

[449] Fix | Delete

pass

[450] Fix | Delete

[451] Fix | Delete

def write_history():

[452] Fix | Delete

try:

[453] Fix | Delete

readline.write_history_file(history)

[454] Fix | Delete

except OSError:

[455] Fix | Delete

# bpo-19891, bpo-41193: Home directory does not exist

[456] Fix | Delete

# or is not writable, or the filesystem is read-only.

[457] Fix | Delete

pass

[458] Fix | Delete

[459] Fix | Delete

atexit.register(write_history)

[460] Fix | Delete

[461] Fix | Delete

sys.__interactivehook__ = register_readline

[462] Fix | Delete

[463] Fix | Delete

def venv(known_paths):

[464] Fix | Delete

global PREFIXES, ENABLE_USER_SITE

[465] Fix | Delete

[466] Fix | Delete

env = os.environ

[467] Fix | Delete

if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in env:

[468] Fix | Delete

executable = sys._base_executable = os.environ['__PYVENV_LAUNCHER__']

[469] Fix | Delete

else:

[470] Fix | Delete

executable = sys.executable

[471] Fix | Delete

exe_dir, _ = os.path.split(os.path.abspath(executable))

[472] Fix | Delete

site_prefix = os.path.dirname(exe_dir)

[473] Fix | Delete

sys._home = None

[474] Fix | Delete

conf_basename = 'pyvenv.cfg'

[475] Fix | Delete

candidate_confs = [

[476] Fix | Delete

conffile for conffile in (

[477] Fix | Delete

os.path.join(exe_dir, conf_basename),

[478] Fix | Delete

os.path.join(site_prefix, conf_basename)

[479] Fix | Delete

)

[480] Fix | Delete

if os.path.isfile(conffile)

[481] Fix | Delete

]

[482] Fix | Delete

[483] Fix | Delete

if candidate_confs:

[484] Fix | Delete

virtual_conf = candidate_confs[0]

[485] Fix | Delete

system_site = "true"

[486] Fix | Delete

# Issue 25185: Use UTF-8, as that's what the venv module uses when

[487] Fix | Delete

# writing the file.

[488] Fix | Delete

with open(virtual_conf, encoding='utf-8') as f:

[489] Fix | Delete

for line in f:

[490] Fix | Delete

if '=' in line:

[491] Fix | Delete

key, _, value = line.partition('=')

[492] Fix | Delete

key = key.strip().lower()

[493] Fix | Delete

value = value.strip()

[494] Fix | Delete

if key == 'include-system-site-packages':

[495] Fix | Delete

system_site = value.lower()

[496] Fix | Delete

elif key == 'home':

[497] Fix | Delete

sys._home = value

[498] Fix | Delete

[499] Fix | Delete