Automatic configuration of the tab key in Python

Automatic configuration of the tab key in Python

When a beginner learns Python, how can he not have the tab key completion function? I feel like it is a nightmare. For cainiao like us, I just got started with python and didn't know everything, fortunately, with the guidance of our predecessors, I learned about it and recorded it. I haven't learned this function yet! Get it!

• 1. First, check the python installation path.

[root@localhost ~]# pythonPython 2.6.6 (r266:84292, Oct 12 2012, 14:23:48) [GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> import sys>>> sys.path['', '/usr/lib64/python26.zip', '/usr/lib64/python2.6', '/usr/lib64/python2.6/plat-linux2', '/usr/lib64/python2.6/lib-tk', '/usr/lib64/python2.6/lib-old', '/usr/lib64/python2.6/lib-dynload', '/usr/lib64/python2.6/site-packages', '/usr/lib64/python2.6/site-packages/gst-0.10', '/usr/lib64/python2.6/site-packages/gtk-2.0', '/usr/lib64/python2.6/site-packages/webkit-1.0', '/usr/lib/python2.6/site-packages']

• Switch the directory to the python installation directory and write the tab key completion module.

[root@localhost ~]# cd /usr/lib64/python2.6[root@localhost python2.6]# vim tab.py#!/usr/bin/env python # python startup file import sysimport readlineimport rlcompleterimport atexitimport 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:    passatexit.register(readline.write_history_file, histfile)del os, histfile, readline, rlcompleter

• After writing, you can import the tab key to python to complete the task.

root@localhost python2.6]# pythonPython 2.6.6 (r266:84292, Oct 12 2012, 14:23:48) [GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> import tab>>> sys.sys.__class__(              sys.__reduce_ex__(          sys.builtin_module_names    sys.exitfunc(               sys.maxsize                 sys.setprofile(sys.__delattr__(            sys.__repr__(               sys.byteorder               sys.flags                   sys.maxunicode              sys.setrecursionlimit(sys.__dict__                sys.__setattr__(            sys.call_tracing(           sys.float_info              sys.meta_path               sys.settrace(sys.__displayhook__(        sys.__sizeof__(             sys.callstats(              sys.getcheckinterval(       sys.modules                 sys.stderrsys.__doc__                 sys.__stderr__              sys.copyright               sys.getdefaultencoding(     sys.path                    sys.stdinsys.__excepthook__(         sys.__stdin__               sys.displayhook(            sys.getdlopenflags(         sys.path_hooks              sys.stdoutsys.__format__(             sys.__stdout__              sys.dont_write_bytecode     sys.getfilesystemencoding(  sys.path_importer_cache     sys.subversionsys.__getattribute__(       sys.__str__(                sys.exc_clear(              sys.getprofile(             sys.platform                sys.versionsys.__hash__(               sys.__subclasshook__(       sys.exc_info(               sys.getrecursionlimit(      sys.prefix                  sys.version_infosys.__init__(               sys._clear_type_cache(      sys.exc_type                sys.getrefcount(            sys.ps1                     sys.warnoptionssys.__name__                sys._current_frames(        sys.excepthook(             sys.getsizeof(              sys.ps2                     sys.__new__(                sys._getframe(              sys.exec_prefix             sys.gettrace(               sys.py3kwarning             sys.__package__             sys.api_version             sys.executable              sys.hexversion              sys.setcheckinterval(       sys.__reduce__(             sys.argv                    sys.exit(                   sys.maxint                  sys.setdlopenflags(         

• In order to enter the python directory, you do not need to import it every time. In this case, go to the home directory, write the. bashrc file, add the following line at the end, save and exit.

[root@localhost ~]# cd ~[root@localhost ~]# vim .bashrcexport PYTHONSTARTUP=/usr/lib64/python2.6/tab.py

• The Home Directory. bashrc file takes effect only when the user logs on. You need to perform the following operations to take effect.

[root@localhost ~]# source .bashrc 

OK, so now we don't need to execute the import tab action every time after python to make the tab key completion function take effect.

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