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Label class (Tkinter module) 
lambda expressions 
LAPACKlapack_lite libraries 
last method
    bsddb module 
    NNTP object 
lastChild attribute (Node object) 
lastcmd attribute (cmd module) 
lastgroup attribute (match object) 
lastindex attribute (match object) 
layout manager 
LBYL (look before you leap) 
LC_COLLATE attribute (locale module) 
LC_CTYPE attribute (locale module) 
LC_MESSAGES attribute (locale module) 
LC_MONETARY attribute (locale module) 
LC_NUMERIC attribute (locale module) 
LC_TIME attribute (locale module) 
ldexp function
    cmath module 
    math module 
__le__ special method 
leapdays function (calendar module) 
len function (built-in)  2nd  3rd 
__len__ special method  2nd 
less than sign (<)
    comparisons 
    double less than (<<)
        left shift 
    struct format string 
Lesser GPL (LGPL) 
letters attribute (string module) 
LGPL (Lesser GPL) 
libraries argument (distutils Extension class) 
library_dirs argument (distutils Extension class) 
license argument (distutils setup function) 
line-completion functionality 
LinearAlgebra module 
linecache module 
    checkcache function 
    clearcache function 
    getline function 
lineno function (fileinput module) 
linesep attribute (os module) 
Linux
    installing Python from binaries 
    Python IDEs 
    Red Hat Linux releases 6.x/7.x
        Python v1.5.2 and 
    support for cryptographic-quality pseudo-random numbers 
list command (pdb module) 
list comprehensions 
list method
    NNTP object 
    POP3 object 
list object (list type)  2nd 
    append method 
    count method 
    extend method 
    index method 
    insert method 
    pop method 
    remove method 
    reverse method 
    sort method 
Listbox class (Tkinter module) 
    curselection method 
    delete method 
    get method 
    insert method 
    select_clear method 
    select_set method 
listbox widgets 
listdir function (os module) 
listen method (socket object) 
listenTCP method (reactor object) 
listMethods method (ServerProxy object) 
lists 
    maintaining order of 
    methods 
    modifying 
    optimizing operations on 
    sequence operations on 
literals  2nd 
ljust method (string object) 
load method
    SimpleCookie object 
    SmartCookie object 
load/loads functions
    marshal module 
    pickle/cPickle modules 
loading modules  2nd 
    built-in 
    circular imports 
    custom importers 
    dictionary listing names 
    __import__ function 
    main program and 
    reload function 
    searching filesystem 
    specifying directory paths 
    sys.modules entries 
local variables  2nd 
LOCALE attribute (re module) 
locale module 
    atof function 
    atoi function 
    attributes 
    format function 
    getdefaultlocale function 
    getlocale function 
    localeconv function 
    normalize function 
    resetlocale function 
    setlocale function 
    str function 
    strcoll function 
    strxfrm function 
locale sensitivity, string module  [See locale module]
localeconv function (locale module) 
localName attribute (Node object) 
locals function (built-in) 
localtime function
    mx.DateTime module 
    time module 
localtime method (DateTime class) 
lock object 
    acquire method 
    locked method 
    release method 
locked method (lock object) 
log function
    cmath module 
    math module 
log10 function
    cmath module 
    math module 
logging errors
    by rebinding excepthook attribute  2nd 
login method
    FTP object 
    SMTP object 
long integers 
__long__ special method 
long type (built-in)  2nd 
Long-Running Web Processes (LRWP) 
look before you leap (LBYL) 
LookupError exception 
loop function (asyncore module) 
loops, optimizing 
loseConnection method (transports object) 
lower method (string object) 
lowercase attribute (string module) 
LRWP (Long-Running Web Processes) 
lseek function (os module) 
lshift method (operator module) 
__lshift__ special method 
lstrip method (string object) 
__lt__ special method