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r�nXdS(as}OS routines for NT or Posix depending on what system we're on.

This exports:
  - all functions from posix, nt, os2, or ce, e.g. unlink, stat, etc.
  - os.path is one of the modules posixpath, or ntpath
  - os.name is 'posix', 'nt', 'os2', 'ce' or 'riscos'
  - os.curdir is a string representing the current directory ('.' or ':')
  - os.pardir is a string representing the parent directory ('..' or '::')
  - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\')
  - os.extsep is the extension separator ('.' or '/')
  - os.altsep is the alternate pathname separator (None or '/')
  - os.pathsep is the component separator used in $PATH etc
  - os.linesep is the line separator in text files ('\r' or '\n' or '\r\n')
  - os.defpath is the default search path for executables
  - os.devnull is the file path of the null device ('/dev/null', etc.)

Programs that import and use 'os' stand a better chance of being
portable between different platforms.  Of course, they must then
only use functions that are defined by all platforms (e.g., unlink
and opendir), and leave all pathname manipulation to os.path
(e.g., split and join).
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Super-mkdir; create a leaf directory and all intermediate ones.
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    just the rightmost) will be created if it does not exist.  This is
    recursive.

N(	R	tsplittexiststmakedirstOSErrorterrnotEEXISTRtmkdir(Rtmodetheadttailte((s/usr/lib64/python2.7/os.pyR �s	
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Super-rmdir; remove a leaf directory and all empty intermediate
    ones.  Works like rmdir except that, if the leaf directory is
    successfully removed, directories corresponding to rightmost path
    segments will be pruned away until either the whole path is
    consumed or an error occurs.  Errors during this latter phase are
    ignored -- they generally mean that a directory was not empty.

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Super-rename; create directories as necessary and delete any left
    empty.  Works like rename, except creation of any intermediate
    directories needed to make the new pathname good is attempted
    first.  After the rename, directories corresponding to rightmost
    path segments of the old name will be pruned until either the
    whole path is consumed or a nonempty directory is found.

Note: this function can fail with the new directory structure made
    if you lack permissions needed to unlink the leaf directory or
    file.

N(R	RRR trenameR+R*(toldtnewR&R'((s/usr/lib64/python2.7/os.pytrenames�s

R R+R/ccs:tjtjtj}}}yt|�}Wn-tk
r\}|dk	rX||�ndSXgg}	}
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Directory tree generator.

For each directory in the directory tree rooted at top (including top
    itself, but excluding '.' and '..'), yields a 3-tuple

dirpath, dirnames, filenames

dirpath is a string, the path to the directory.  dirnames is a list of
    the names of the subdirectories in dirpath (excluding '.' and '..').
    filenames is a list of the names of the non-directory files in dirpath.
    Note that the names in the lists are just names, with no path components.
    To get a full path (which begins with top) to a file or directory in
    dirpath, do os.path.join(dirpath, name).

If optional arg 'topdown' is true or not specified, the triple for a
    directory is generated before the triples for any of its subdirectories
    (directories are generated top down).  If topdown is false, the triple
    for a directory is generated after the triples for all of its
    subdirectories (directories are generated bottom up).

When topdown is true, the caller can modify the dirnames list in-place
    (e.g., via del or slice assignment), and walk will only recurse into the
    subdirectories whose names remain in dirnames; this can be used to prune the
    search, or to impose a specific order of visiting.  Modifying dirnames when
    topdown is false is ineffective, since the directories in dirnames have
    already been generated by the time dirnames itself is generated. No matter
    the value of topdown, the list of subdirectories is retrieved before the
    tuples for the directory and its subdirectories are generated.

By default errors from the os.listdir() call are ignored.  If
    optional arg 'onerror' is specified, it should be a function; it
    will be called with one argument, an os.error instance.  It can
    report the error to continue with the walk, or raise the exception
    to abort the walk.  Note that the filename is available as the
    filename attribute of the exception object.

By default, os.walk does not follow symbolic links to subdirectories on
    systems that support them.  In order to get this functionality, set the
    optional argument 'followlinks' to true.

Caution:  if you pass a relative pathname for top, don't change the
    current working directory between resumptions of walk.  walk never
    changes the current directory, and assumes that the client doesn't
    either.

Example:

import os
    from os.path import join, getsize
    for root, dirs, files in os.walk('python/Lib/email'):
        print root, "consumes",
        print sum([getsize(join(root, name)) for name in files]),
        print "bytes in", len(files), "non-directory files"
        if 'CVS' in dirs:
            dirs.remove('CVS')  # don't visit CVS directories

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Execute the executable file with argument list args, replacing the
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Execute the executable file with argument list args and
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Execute the executable file (which is searched for along $PATH)
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Execute the executable file (which is searched for along $PATH)
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Execute the executable file (which is searched for along $PATH)
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Execute the executable file (which is searched for along $PATH)
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			cCstj||�S(s�Get an environment variable, return None if it doesn't exist.
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cCst|||dt�S(sspawnv(mode, file, args) -> integer

Execute file with arguments from args in a subprocess.
If mode == P_NOWAIT return the pid of the process.
If mode == P_WAIT return the process's exit code if it exits normally;
otherwise return -SIG, where SIG is the signal that killed it. N(R�R4RA(R%RBRC((s/usr/lib64/python2.7/os.pyR~.scCst||||t�S(s:spawnve(mode, file, args, env) -> integer

Execute file with arguments from args in a subprocess with the
specified environment.
If mode == P_NOWAIT return the pid of the process.
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otherwise return -SIG, where SIG is the signal that killed it. (R�RE(R%RBRCRF((s/usr/lib64/python2.7/os.pytspawnve7scCst|||dt�S(s8spawnvp(mode, file, args) -> integer

Execute file (which is looked for along $PATH) with arguments from
args in a subprocess.
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otherwise return -SIG, where SIG is the signal that killed it. N(R�R4RH(R%RBRC((s/usr/lib64/python2.7/os.pytspawnvpCscCst||||t�S(s\spawnvpe(mode, file, args, env) -> integer

Execute file with arguments from args in a subprocess.
If mode == P_NOWAIT return the pid of the process.
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otherwise return -SIG, where SIG is the signal that killed it. (R~(R%RBRC((s/usr/lib64/python2.7/os.pytspawnl[scGs!|d}t|||d |�S(s:spawnle(mode, file, *args, env) -> integer

Execute file with arguments from args in a subprocess with the
supplied environment.
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otherwise return -SIG, where SIG is the signal that killed it. i����(R�(R%RBRCRF((s/usr/lib64/python2.7/os.pytspawnleds
R�R�R�R�cGst|||�S(sWspawnlp(mode, file, *args) -> integer

Execute file (which is looked for along $PATH) with arguments from
args in a subprocess with the supplied environment.
If mode == P_NOWAIT return the pid of the process.
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otherwise return -SIG, where SIG is the signal that killed it. i����(R�(R%RBRCRF((s/usr/lib64/python2.7/os.pytspawnlpe�s
R�R�R�tpopen2ttcCs�ddl}d}|j|tdd�ddl}|j}|j|dt|t�d|d|d	|d
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:		\

#
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