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I/O operations
    auxiliary modules for 
        fileinput 
        linecache 
        struct 
        xreadlines 
    error streams 
    failure of 
    optimizing 
    richer-text Input/output 
        console I/O 
        readline module 
    StringIO/cStringIO modules 
    text Input/output 
        getpass module 
        print statement 
        standard input 
        standard output/standard error 
__iadd__ special method 
__iand__ special method 
IBM AS/400, installing Python 
IBM DB/2 
iconify method (Toplevel object) 
id function (built-in) 
identchars attribute (cmd module) 
identifiers  2nd 
    characters not allowed in 
identity function (Numeric module) 
IDEs (Integrated Development Environments) 
__idiv__ special method 
IDLE (Interactive DeveLopment Environment) 
    debugging in 
if statements 
    continue statements in place of 
__ifloordiv__ special method 
ignore command (pdb module) 
IGNORECASE attribute (re module) 
__ilshift__ special method 
imag method (array object) 
image_create method (Text object) 
images, supported by Tkinter module 
imaginary method (array object) 
IMAP4 (Internet Message Access Protocol Version 4) 
immutable objects 
__imod__ special method 
implementations of Python 
__import__ function (built-in)  2nd  3rd 
import statement 
ImportError exception 
__imul__ special method 
include_dirs argument (distutils Extension class) 
IndentationError exception 
index method
    list object 
    string object 
    Text object 
Indexed-Sequential Access Method (ISAM) 
IndexError exception 
indexing
    dictionaries 
    sequences 
    targets 
indexOf method (operator module) 
indices function (Numeric module) 
industry-specific markup languages 
inet_aton function (socket module) 
inet_ntoa function (socket module) 
info method (URL file-like object) 
infolist function (ZipFile class) 
InfoZip zlib compression library 
inheritance
    classic classes  2nd 
        delegating to superclass methods 
        ÒdeletingÓ class attributes 
        overriding attributes 
    new-style object model 
        cooperative superclass method calling 
        method resolution order 
__init__ special method  2nd  3rd 
__init__.py file 
innerproduct function (Numeric module) 
input function
    built-in  2nd 
        safer variant of 
    fileinput module 
insert method
    Entry object 
    list object 
    Listbox object 
    Menu object 
    Text object 
insert_cascade method (Menu object) 
insert_checkbutton method (Menu object) 
insert_command method (Menu object) 
insert_radiobutton method (Menu object) 
insert_separator method (Menu object) 
insertBefore method (Node object) 
insort function (bisect module) 
inspect module  2nd 
    currentframe function 
    formatargspec function 
    formatargvalues function 
    getargspec function  2nd 
    getdoc function 
    getfile function 
    getmembers function 
    getmodule function 
    getmro function 
    getsource function 
    getsourcefile function 
    getsourcelines function 
    isbuiltin function 
    isclass function 
    iscode function 
    isframe function 
    isfunction function 
    ismethod function 
    ismodule function 
    isroutine function 
    stack function 
insstr method (Window object) 
install function (gettext module) 
install_opener function (urllib2 module) 
Installer tool 
installing 
    C-coded Python extensions 
    CPython 
    Jython  2nd 
    platform-specific installers, packages distributed as 
    Python from binaries 
    Python from source code 
        Macintosh 
        Unix 
        Windows 
    resident extension modules 
instances
    of classic classes 
        attributes 
        factory functions 
    of new-style classes 
        per-instance methods 
__int__ special method 
int type (built-in)  2nd 
integers
    bitwise operations on, numeric operations and 
    converting numbers to 
    converting to hexadecimal strings 
    converting to octal strings 
    largest in this version of Python, retrieving 
    literals 
    retrieving list of in arithmetic progression 
Integrated Development Environments (IDEs) 
inter-process communication  [See IPC]
interact method (Telnet object) 
Interactive DeveLopment Environment  [See IDLE]
interactive sessions  2nd 
    isatty function (file object) 
    Python interpreter 
    readline module 
    sys.displayhook 
internal types 
internationalization 
    codecs module 
    currency formatting 
    gettext module 
    locale module 
    localization 
Internet Message Access Protocol Version 4 (IMAP4) 
Internet Protocol (IP) 
Internet servers 
interoperability, Python release and debugging builds 
intro attribute (cmd module) 
invert method (operator module) 
__invert__ special method 
invoke method
    Button object 
    Checkbutton object 
    Menu object 
    Radiobutton object 
IOError exceptions  2nd 
__ior__ special method 
IP (Internet Protocol) 
IPC (inter-process communication) 
    cross-platform mechanism  [See mmap module]
    mmap object, using for 
__ipow__ special method 
__irshift__ special method 
is_multipart method (Message object) 
is_output method
    Morsel object 
    SimpleCookie object 
    SmartCookie object 
is_zipfile function (zipfile module) 
isabs function (os.path module) 
isAlive method (Thread object) 
isalnum method (string object) 
isalpha method (string object) 
ISAM (Indexed-Sequential Access Method) 
ISAPI 
isatty method (file object) 
isbuiltin function (inspect module) 
isclass function (inspect module) 
iscode function (inspect module) 
iscontiguous method (array object) 
isDaemon method (Thread object) 
isdigit method (string object) 
isdir function (os.path module) 
isenabled function (gc module) 
isfile function (os.path module) 
isfirstline function (fileinput module) 
isframe function (inspect module) 
isfunction function (inspect module) 
isinstance function (built-in)  2nd  3rd 
isleap function (calendar module) 
islink function (os.path module) 
islower method (string object) 
ismethod function (inspect module) 
ismodule function (inspect module) 
ismount function (os.path module) 
ISO 8601 formats, time/date values in 
ISO module 
ISO-compliant C compiler, installing Python and 
iso_week attribute (DateTime class) 
isroutine function (inspect module) 
isSameNode method (Node object) 
isSet method (Event object) 
isspace method (string object) 
isstdin function (fileinput module) 
issubclass function (built-in)  2nd 
istitle method (string object) 
__isub__ special method 
isupper method (string object) 
itemcget method (Canvas object) 
itemconfig method (Canvas object) 
items 
    returning largest/smallest 
items method (dictionary object) 
itemsize method (array object) 
iter function (built-in)  2nd 
__iter__ special method 
iteration
    file object 
    iterators 
        creating 
    Python versions 
iteritems method (dictionary object) 
iterkeys method (dictionary object) 
itervalues method (dictionary object) 
__itruediv__ special method 
__ixor__ special method