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F2PY library 
fabs function
    cmath module 
    math module 
factory functions 
fail method (TestCase object) 
failIf method (TestCase object) 
failIfEqual method (TestCase object) 
failUnless method (TestCase object) 
failUnlessEqual method (TestCase object) 
failUnlessRaises method (TestCase object) 
FancyURLopener class 
    prompt_user_passwd method 
    version method 
Fast Fourier Transforms (FFTs) 
FastCGI 
fdopen function (os module) 
Feasts module 
February attribute (mx.DateTime module) 
feed method
    HTMLParser object 
    sgmllib module 
    XMLReader object 
fetchall method (Cursor object) 
fetchmany method (Cursor object) 
fetchone method (Cursor object) 
FFT module 
FFTPACK/fftpack libraries 
FFTs (Fast Fourier Transforms) 
FieldStorage class (cgi module) 
    disposition attribute 
    disposition_options attribute 
    file attribute 
    filename attribute 
    getfirst method 
    getlist method 
    getvalue method 
    headers attribute 
    name attribute 
    type attribute 
    type_option attribute 
    value attribute 
file attribute (FieldStorage object) 
file descriptors
    duplicating 
    operations on 
    OS-level 
file extensions, order of, when searching filesystem for modules 
file object (file type)  2nd  3rd 
    attributes 
    close method 
    closed attribute 
    creating 
        designating buffering 
        sequential/nonsequential access 
        specifying file mode 
    fileno method 
    flush method 
    isatty method 
    iteration on 
    memory-mapped  [See mmap object]
    methods 
    mode attribute 
    mode of 
    name attribute 
    open, alternate way to create 
    polymorphism and 
    read method 
    readline method 
    readlines method 
    seek method 
    softspace attribute 
    tell method 
    truncate method 
    write method 
    writelines method 
    xreadlines method 
file_size attribute (zipfile module) 
filecmp module 
    cmp function 
    cmpfiles function 
    dircmp function 
FileInput function (fileinput module) 
fileinput module 
    close method 
    FileInput function 
    filelineno function 
    filename function 
    input function 
    isfirstline function 
    isstdin function 
    lineno function 
    nextfile function 
filelineno function (fileinput module) 
filename attribute
    FieldStorage object 
    os module 
    zipfile module 
filename function (fileinput module) 
fileno method (file object) 
files  2nd  [See also file object][See also file object]3rd 
    buffering 
    comparing 
    compressed 
        gzip module 
        tar archive 
        zipfile module 
        zlib module 
    copying 
    creating/opening 
    .dll 
    HTML, getting information from 
    information about, retrieving 
    __init__.py 
    .jar, Jython and 
    jython.jar 
    MANIFEST 
    msvcrt.dll 
    .pythonrc.py 
    removing 
    renaming 
    setting time on 
    site.py 
    .so 
    as symbolic links 
    text 
    truncating 
filesystems 
    case-sensitive 
    operations of 
        permissions 
    searching for modules 
filter function (built-in) 
filterwarnings function (warnings module) 
find method
    mmap object 
    string object 
findall method (regular expression object) 
first function (bsddb module) 
firstChild attribute (Node object) 
firstweekday function (calendar module) 
flag values, anydbm.open 
flags argument (compile function) 
flags attribute (regular expression object) 
flash method
    Button object 
    Checkbutton object 
    Radiobutton object 
flat method (array object) 
__float__ special method 
float type (built-in)  2nd 
floating-point numbers
    generating pseudo-random 
    literals 
    mathematical functions on 
    rounding off 
    in string formats 
FloatingPointError exception 
floor function
    cmath module 
    math module 
__floordiv__ special method 
flush method
    file object 
    mmap object 
fmod function
    cmath module 
    math module 
focus_set method (Widget object) 
Font class (tkFont module) 
    actual method 
    cget method 
    config method 
    copy method 
for statement 
    else clause 
    iterators  2nd 
    list comprehensions 
    range/xrange functions 
formal parameters 
format function (locale module) 
formatargspec function (inspect module) 
formatargvalues function (inspect module) 
formatdate function (Utils module) 
formatter attribute (HTMLParser object) 
formatter module 
    AbstractFormatter class 
    AbstractWriter class 
    DumbWriter class 
    NullFormatter class 
    NullWriter class 
formatting strings 
    common idioms 
    conversion characters 
    specifier syntax 
formatwarning function (warnings module) 
Fortran
    -coded libraries 
    extending Python 
forward slash (/)
    directory paths  2nd 
        Unix/Windows 
    division 
    division operator 
        determining behavior of 
    double forward slash (//)
        truncating division 
found_terminator method (async_chat object) 
4Suite 
Frame class (Tkinter module) 
frame type 
frexp function
    cmath module 
    math module 
Friday attribute (mx.DateTime module) 
from statement
    avoiding from...import 
    importing modules from packages 
    module object 
fromfile method (array object) 
fromlist method (array object) 
fromstring function (Numeric module) 
fromstring method (array object) 
fstat function (os module) 
FTE editor 
FTP class (ftplib module) 
    connect method 
    cwd method 
    delete method 
    login method 
    mkd method 
    pwd method 
    quit method 
    rename method 
    retrbinary method 
    retrlines method 
    rmd method 
    sendcmd method 
    set_pasv method 
    size method 
    storbinary method 
    storlines method 
FTP protocol  2nd 
    ftplib module 
    twisted.protocols package 
FTP servers 
ftplib module  2nd 
Full class (Queue module) 
full method (Queue object) 
fullname argument (distutils setup function) 
func_code attribute (method object) 
function object
    func_code attribute 
functions 
    attributes of 
    built-in 
    C-coded Python extension modules 
    defining 
        in a class body 
    function calls  2nd 
        arguments  2nd 
    generators 
    lambda expressions 
    local variables 
    namespaces 
        global statement 
        nested functions/scopes 
    parameters 
    recursion 
    return statement 
    termination