1 >>>python27
2 >>>import sys

 >>>sys.path

 ['', '/usr/local/python27/lib/python27.zip', '/usr/local/python27/lib/python2.7', '/usr/local/python27/lib/python2.7/plat-linux2', '/usr/local/python27/lib/python2.7/lib-tk', '/usr/local/python27/lib/python2.7/lib-old', '/usr/local/python27/lib/python2.7/lib-dynload', '/usr/local/python27/lib/python2.7/site-packages']

 #cat tab.py

 #!/usr/bin/env python

 # python startup file

 import sys

 import readline

 import rlcompleter

 import atexit

 import os

 # tab completion

 readline.parse_and_bind('tab: complete')

 # history file

 histfile = os.path.join(os.environ['HOME'], '.pythonhistory')

 try:

     readline.read_history_file(histfile)

 except IOError:

     pass

 atexit.register(readline.write_history_file, histfile)

 del os, histfile, readline, rlcompleter

#echo "export PYTHONTAB=/usr/local/python27/lib/python2.7/tab.py" >>/etc/profile

#source /etc/profile

[root@web01 python2.7]# python27

Python 2.7.10 (default, Jan 12 2016, 16:23:29)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import tab

>>> import sys

>>> sys.

sys.__class__(              sys.argv                    sys.hexversion

sys.__delattr__(            sys.builtin_module_names    sys.long_info

sys.__dict__                sys.byteorder               sys.maxint

sys.__displayhook__(        sys.call_tracing(           sys.maxsize

sys.__doc__                 sys.callstats(              sys.maxunicode

sys.__excepthook__(         sys.copyright               sys.meta_path

sys.__format__(             sys.displayhook(            sys.modules

sys.__getattribute__(       sys.dont_write_bytecode     sys.path

sys.__hash__(               sys.exc_clear(              sys.path_hooks

sys.__init__(               sys.exc_info(               sys.path_importer_cache

sys.__name__                sys.exc_type                sys.platform

sys.__new__(                sys.excepthook(             sys.prefix

sys.__package__             sys.exec_prefix             sys.ps1

sys.__reduce__(             sys.executable              sys.ps2

sys.__reduce_ex__(          sys.exit(                   sys.py3kwarning

sys.__repr__(               sys.exitfunc(               sys.setcheckinterval(

sys.__setattr__(            sys.flags                   sys.setdlopenflags(

sys.__sizeof__(             sys.float_info              sys.setprofile(

sys.__stderr__              sys.float_repr_style        sys.setrecursionlimit(

sys.__stdin__               sys.getcheckinterval(       sys.settrace(

sys.__stdout__              sys.getdefaultencoding(     sys.stderr

sys.__str__(                sys.getdlopenflags(         sys.stdin

sys.__subclasshook__(       sys.getfilesystemencoding(  sys.stdout

sys._clear_type_cache(      sys.getprofile(             sys.subversion

sys._current_frames(        sys.getrecursionlimit(      sys.version

sys._getframe(              sys.getrefcount(            sys.version_info

sys._mercurial              sys.getsizeof(              sys.warnoptions

sys.api_version             sys.gettrace(

>>> sys.