Python2.7 help("modules")时出错（CentOS 64bits）
在虚拟机上运行时出现这个错误，查了下貌似没见到类似的情况。
使用版本是python2.7.5，升级到2.7.9后问题就没了
help> modules
Please wait a moment while I gather a list of all available modules...
BaseHTTPServer array imaplib sgmllib
Bastion ast imghdr sha
CDROM asynchat imp shelve
CGIHTTPServer asyncore importlib shlex
Canvas atexit imputil shutil
ConfigParser audiodev inspect signal
Cookie audioop io site
DLFCN base64 itertools smtpd
Dialog bdb json smtplib
DocXMLRPCServer binascii keyword sndhdr
FileDialog binhex lib2to3 socket
FixTk bisect linecache spwd
HTMLParser bsddb linuxaudiodev sqlite3
IN cPickle locale sre
MimeWriter cProfile logging sre_compile
Queue cStringIO macpath sre_constants
ScrolledText calendar macurl2path sre_parse
SimpleDialog cgi mailbox ssl
SimpleHTTPServer cgitb mailcap stat
SimpleXMLRPCServer chunk markupbase statvfs
SocketServer cmath marshal string
StringIO cmd math stringold
TYPES code md5 stringprep
Tix codecs mhlib strop
Tkconstants codeop mimetools struct
Tkdnd collections mimetypes subprocess
Tkinter colorsys mimify sunau
UserDict commands mmap sunaudio
UserList compileall modulefinder symbol
UserString compiler multifile symtable
_LWPCookieJar contextlib multiprocessing sys
_MozillaCookieJar cookielib mutex sysconfig
__builtin__ copy netrc syslog
__future__ copy_reg new tabnanny
_abcoll crypt nis tarfile
_ast csv nntplib telnetlib
_bisect ctypes ntpath tempfile
_codecs curses nturl2path termios
_codecs_cn datetime numbers test
_codecs_hk dbhash opcode textwrap
_codecs_iso2022 decimal operator this
_codecs_jp difflib optparse thread
_codecs_kr dircache os threading
_codecs_tw dis os2emxpath time
_collections distutils ossaudiodev timeit
_csv doctest parser tkColorChooser
_ctypes dumbdbm pdb tkCommonDialog
_ctypes_test dummy_thread pickle tkFileDialog
_elementtree dummy_threading pickletools tkFont
_functools email pipes tkMessageBox
_heapq encodings pkgutil tkSimpleDialog
_hotshot ensurepip platform toaiff
_io errno plistlib token
_json exceptions popen2 tokenize
_locale fcntl poplib trace
_lsprof filecmp posix traceback
_md5 fileinput posixfile ttk
_multibytecodec fnmatch posixpath tty
_multiprocessing formatter pprint turtle
_osx_support fpformat profile types
_pyio fractions pstats unicodedata
_random ftplib pty unittest
_sha functools pwd urllib
_sha256 future_builtins py_compile urllib2
_sha512 gc pyclbr urlparse
_socket genericpath pydoc user
_sre getopt pydoc_data uu
_strptime getpass pyexpat uuid
_struct gettext quopri warnings
_symtable glob random wave
_sysconfigdata grp re weakref
_testcapi gzip repr webbrowser
_threading_local hashlib resource whichdb
_warnings heapq rexec wsgiref
_weakref hmac rfc822 xdrlib
_weakrefset hotshot rlcompleter xml
abc htmlentitydefs robotparser xmllib
aifc htmllib runpy xmlrpclib
antigravity httplib sched xxsubtype
anydbm idlelib select zipfile
argparse ihooks sets zipimport
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