FM / python3.7

/opt/alt/python37/lib64/python3.7

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.7m/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
ensurepip/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
idlelib/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
site-packages/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	5580	0644	edit dl rm
aifc.py	32814	0644	edit dl rm
antigravity.py	477	0644	edit dl rm
argparse.py	95372	0644	edit dl rm
ast.py	12842	0644	edit dl rm
asynchat.py	11328	0644	edit dl rm
asyncore.py	20118	0644	edit dl rm
base64.py	20393	0755	edit dl rm
bdb.py	31730	0644	edit dl rm
binhex.py	13954	0644	edit dl rm
bisect.py	2557	0644	edit dl rm
bz2.py	12410	0644	edit dl rm
calendar.py	24826	0644	edit dl rm
cgi.py	35050	0755	edit dl rm
cgitb.py	12018	0644	edit dl rm
chunk.py	5435	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10622	0644	edit dl rm
codecs.py	36615	0644	edit dl rm
codeop.py	6275	0644	edit dl rm
colorsys.py	4064	0644	edit dl rm
compileall.py	13788	0644	edit dl rm
configparser.py	54283	0644	edit dl rm
contextlib.py	24763	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8856	0644	edit dl rm
copyreg.py	7017	0644	edit dl rm
cProfile.py	6253	0755	edit dl rm
crypt.py	3346	0644	edit dl rm
csv.py	16180	0644	edit dl rm
dataclasses.py	49520	0644	edit dl rm
datetime.py	86544	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	84393	0644	edit dl rm
dis.py	19888	0644	edit dl rm
doctest.py	104560	0644	edit dl rm
dummy_threading.py	2815	0644	edit dl rm
enum.py	35043	0644	edit dl rm
filecmp.py	9830	0644	edit dl rm
fileinput.py	14625	0644	edit dl rm
fnmatch.py	4056	0644	edit dl rm
formatter.py	15143	0644	edit dl rm
fractions.py	23752	0644	edit dl rm
ftplib.py	35618	0644	edit dl rm
functools.py	32932	0644	edit dl rm
genericpath.py	4912	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5994	0644	edit dl rm
gettext.py	21967	0644	edit dl rm
glob.py	5638	0644	edit dl rm
gzip.py	20637	0644	edit dl rm
hashlib.py	9534	0644	edit dl rm
heapq.py	23017	0644	edit dl rm
hmac.py	6517	0644	edit dl rm
imaplib.py	53292	0644	edit dl rm
imghdr.py	3795	0644	edit dl rm
imp.py	10536	0644	edit dl rm
inspect.py	117635	0644	edit dl rm
io.py	3517	0644	edit dl rm
ipaddress.py	73578	0644	edit dl rm
keyword.py	2256	0755	edit dl rm
linecache.py	5330	0644	edit dl rm
locale.py	78191	0644	edit dl rm
lzma.py	12983	0644	edit dl rm
macpath.py	6123	0644	edit dl rm
mailbox.py	78654	0644	edit dl rm
mailcap.py	9067	0644	edit dl rm
mimetypes.py	21496	0644	edit dl rm
modulefinder.py	23035	0644	edit dl rm
netrc.py	5566	0644	edit dl rm
nntplib.py	43087	0644	edit dl rm
ntpath.py	22340	0644	edit dl rm
nturl2path.py	2584	0644	edit dl rm
numbers.py	10244	0644	edit dl rm
opcode.py	5824	0644	edit dl rm
operator.py	10863	0644	edit dl rm
optparse.py	60371	0644	edit dl rm
os.py	37901	0644	edit dl rm
pathlib.py	50329	0644	edit dl rm
pdb.py	62505	0755	edit dl rm
pickle.py	57994	0644	edit dl rm
pickletools.py	91220	0644	edit dl rm
pipes.py	8916	0644	edit dl rm
pkgutil.py	21461	0644	edit dl rm
platform.py	46994	0755	edit dl rm
plistlib.py	30709	0644	edit dl rm
poplib.py	14964	0644	edit dl rm
posixpath.py	15771	0644	edit dl rm
pprint.py	20884	0644	edit dl rm
profile.py	22494	0755	edit dl rm
pstats.py	27315	0644	edit dl rm
pty.py	4763	0644	edit dl rm
pyclbr.py	15137	0644	edit dl rm
pydoc.py	105876	0644	edit dl rm
py_compile.py	8001	0644	edit dl rm
queue.py	11359	0644	edit dl rm
quopri.py	7265	0755	edit dl rm
random.py	27557	0644	edit dl rm
re.py	15306	0644	edit dl rm
reprlib.py	5267	0644	edit dl rm
rlcompleter.py	7097	0644	edit dl rm
runpy.py	11959	0644	edit dl rm
sched.py	6442	0644	edit dl rm
secrets.py	2038	0644	edit dl rm
selectors.py	18561	0644	edit dl rm
shelve.py	8527	0644	edit dl rm
shlex.py	13100	0644	edit dl rm
shutil.py	41950	0644	edit dl rm
signal.py	2123	0644	edit dl rm
site.py	21575	0644	edit dl rm
smtpd.py	34722	0755	edit dl rm
smtplib.py	44443	0755	edit dl rm
sndhdr.py	7086	0644	edit dl rm
socket.py	27469	0644	edit dl rm
socketserver.py	26923	0644	edit dl rm
sre_compile.py	26872	0644	edit dl rm
sre_constants.py	7177	0644	edit dl rm
sre_parse.py	39156	0644	edit dl rm
ssl.py	45495	0644	edit dl rm
stat.py	5391	0644	edit dl rm
statistics.py	20651	0644	edit dl rm
string.py	11564	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	72649	0644	edit dl rm
sunau.py	18375	0644	edit dl rm
symbol.py	2142	0755	edit dl rm
symtable.py	7279	0644	edit dl rm
sysconfig.py	24440	0644	edit dl rm
tabnanny.py	11419	0755	edit dl rm
tarfile.py	92675	0755	edit dl rm
telnetlib.py	23135	0644	edit dl rm
tempfile.py	26730	0644	edit dl rm
textwrap.py	19407	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	49284	0644	edit dl rm
timeit.py	13493	0755	edit dl rm
token.py	3763	0644	edit dl rm
tokenize.py	27031	0644	edit dl rm
trace.py	28903	0755	edit dl rm
traceback.py	23437	0644	edit dl rm
tracemalloc.py	17076	0644	edit dl rm
tty.py	879	0644	edit dl rm
types.py	9897	0644	edit dl rm
typing.py	56438	0644	edit dl rm
uu.py	7277	0644	edit dl rm
uuid.py	29518	0644	edit dl rm
warnings.py	20080	0644	edit dl rm
wave.py	18230	0644	edit dl rm
weakref.py	21508	0644	edit dl rm
webbrowser.py	23715	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipapp.py	7535	0644	edit dl rm
zipfile.py	81094	0644	edit dl rm
_bootlocale.py	1801	0644	edit dl rm
_collections_abc.py	26424	0644	edit dl rm
_compat_pickle.py	8749	0644	edit dl rm
_compression.py	5340	0644	edit dl rm
_dummy_thread.py	6027	0644	edit dl rm
_markupbase.py	14598	0644	edit dl rm
_osx_support.py	19600	0644	edit dl rm
_pydecimal.py	228690	0644	edit dl rm
_pyio.py	91616	0644	edit dl rm
_py_abc.py	6186	0644	edit dl rm
_sitebuiltins.py	3115	0644	edit dl rm
_strptime.py	25504	0644	edit dl rm
_sysconfigdata_dm_linux_x86_64-linux-gnu.py	29786	0644	edit dl rm
_sysconfigdata_m_linux_x86_64-linux-gnu.py	28651	0644	edit dl rm
_threading_local.py	7214	0644	edit dl rm
_weakrefset.py	5679	0644	edit dl rm
__future__.py	5101	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /opt/alt/python37/lib64/python3.7/asyncore.py (20118B)

# -*- Mode: Python -*-
#   Id: asyncore.py,v 2.51 2000/09/07 22:29:26 rushing Exp
#   Author: Sam Rushing <rushing@nightmare.com>

# ======================================================================
# Copyright 1996 by Sam Rushing
#
#                         All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose and without fee is hereby
# granted, provided that the above copyright notice appear in all
# copies and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of Sam
# Rushing not be used in advertising or publicity pertaining to
# distribution of the software without specific, written prior
# permission.
#
# SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
# NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR
# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
# ======================================================================

"""Basic infrastructure for asynchronous socket service clients and servers.

There are only two ways to have a program on a single processor do "more
than one thing at a time".  Multi-threaded programming is the simplest and
most popular way to do it, but there is another very different technique,
that lets you have nearly all the advantages of multi-threading, without
actually using multiple threads. it's really only practical if your program
is largely I/O bound. If your program is CPU bound, then pre-emptive
scheduled threads are probably what you really need. Network servers are
rarely CPU-bound, however.

If your operating system supports the select() system call in its I/O
library (and nearly all do), then you can use it to juggle multiple
communication channels at once; doing other work while your I/O is taking
place in the "background."  Although this strategy can seem strange and
complex, especially at first, it is in many ways easier to understand and
control than multi-threaded programming. The module documented here solves
many of the difficult problems for you, making the task of building
sophisticated high-performance network servers and clients a snap.
"""

import select
import socket
import sys
import time
import warnings

import os
from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL, \
     ENOTCONN, ESHUTDOWN, EISCONN, EBADF, ECONNABORTED, EPIPE, EAGAIN, \
     errorcode

_DISCONNECTED = frozenset({ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED, EPIPE,
                           EBADF})

try:
    socket_map
except NameError:
    socket_map = {}

def _strerror(err):
    try:
        return os.strerror(err)
    except (ValueError, OverflowError, NameError):
        if err in errorcode:
            return errorcode[err]
        return "Unknown error %s" %err

class ExitNow(Exception):
    pass

_reraised_exceptions = (ExitNow, KeyboardInterrupt, SystemExit)

def read(obj):
    try:
        obj.handle_read_event()
    except _reraised_exceptions:
        raise
    except:
        obj.handle_error()

def write(obj):
    try:
        obj.handle_write_event()
    except _reraised_exceptions:
        raise
    except:
        obj.handle_error()

def _exception(obj):
    try:
        obj.handle_expt_event()
    except _reraised_exceptions:
        raise
    except:
        obj.handle_error()

def readwrite(obj, flags):
    try:
        if flags & select.POLLIN:
            obj.handle_read_event()
        if flags & select.POLLOUT:
            obj.handle_write_event()
        if flags & select.POLLPRI:
            obj.handle_expt_event()
        if flags & (select.POLLHUP | select.POLLERR | select.POLLNVAL):
            obj.handle_close()
    except OSError as e:
        if e.args[0] not in _DISCONNECTED:
            obj.handle_error()
        else:
            obj.handle_close()
    except _reraised_exceptions:
        raise
    except:
        obj.handle_error()

def poll(timeout=0.0, map=None):
    if map is None:
        map = socket_map
    if map:
        r = []; w = []; e = []
        for fd, obj in list(map.items()):
            is_r = obj.readable()
            is_w = obj.writable()
            if is_r:
                r.append(fd)
            # accepting sockets should not be writable
            if is_w and not obj.accepting:
                w.append(fd)
            if is_r or is_w:
                e.append(fd)
        if [] == r == w == e:
            time.sleep(timeout)
            return

r, w, e = select.select(r, w, e, timeout)

for fd in r:
            obj = map.get(fd)
            if obj is None:
                continue
            read(obj)

for fd in w:
            obj = map.get(fd)
            if obj is None:
                continue
            write(obj)

for fd in e:
            obj = map.get(fd)
            if obj is None:
                continue
            _exception(obj)

def poll2(timeout=0.0, map=None):
    # Use the poll() support added to the select module in Python 2.0
    if map is None:
        map = socket_map
    if timeout is not None:
        # timeout is in milliseconds
        timeout = int(timeout*1000)
    pollster = select.poll()
    if map:
        for fd, obj in list(map.items()):
            flags = 0
            if obj.readable():
                flags |= select.POLLIN | select.POLLPRI
            # accepting sockets should not be writable
            if obj.writable() and not obj.accepting:
                flags |= select.POLLOUT
            if flags:
                pollster.register(fd, flags)

r = pollster.poll(timeout)
        for fd, flags in r:
            obj = map.get(fd)
            if obj is None:
                continue
            readwrite(obj, flags)

poll3 = poll2                           # Alias for backward compatibility

def loop(timeout=30.0, use_poll=False, map=None, count=None):
    if map is None:
        map = socket_map

if use_poll and hasattr(select, 'poll'):
        poll_fun = poll2
    else:
        poll_fun = poll

if count is None:
        while map:
            poll_fun(timeout, map)

else:
        while map and count > 0:
            poll_fun(timeout, map)
            count = count - 1

class dispatcher:

debug = False
    connected = False
    accepting = False
    connecting = False
    closing = False
    addr = None
    ignore_log_types = frozenset({'warning'})

def __init__(self, sock=None, map=None):
        if map is None:
            self._map = socket_map
        else:
            self._map = map

self._fileno = None

if sock:
            # Set to nonblocking just to make sure for cases where we
            # get a socket from a blocking source.
            sock.setblocking(0)
            self.set_socket(sock, map)
            self.connected = True
            # The constructor no longer requires that the socket
            # passed be connected.
            try:
                self.addr = sock.getpeername()
            except OSError as err:
                if err.args[0] in (ENOTCONN, EINVAL):
                    # To handle the case where we got an unconnected
                    # socket.
                    self.connected = False
                else:
                    # The socket is broken in some unknown way, alert
                    # the user and remove it from the map (to prevent
                    # polling of broken sockets).
                    self.del_channel(map)
                    raise
        else:
            self.socket = None

def __repr__(self):
        status = [self.__class__.__module__+"."+self.__class__.__qualname__]
        if self.accepting and self.addr:
            status.append('listening')
        elif self.connected:
            status.append('connected')
        if self.addr is not None:
            try:
                status.append('%s:%d' % self.addr)
            except TypeError:
                status.append(repr(self.addr))
        return '<%s at %#x>' % (' '.join(status), id(self))

__str__ = __repr__

def add_channel(self, map=None):
        #self.log_info('adding channel %s' % self)
        if map is None:
            map = self._map
        map[self._fileno] = self

def del_channel(self, map=None):
        fd = self._fileno
        if map is None:
            map = self._map
        if fd in map:
            #self.log_info('closing channel %d:%s' % (fd, self))
            del map[fd]
        self._fileno = None

def create_socket(self, family=socket.AF_INET, type=socket.SOCK_STREAM):
        self.family_and_type = family, type
        sock = socket.socket(family, type)
        sock.setblocking(0)
        self.set_socket(sock)

def set_socket(self, sock, map=None):
        self.socket = sock
        self._fileno = sock.fileno()
        self.add_channel(map)

def set_reuse_addr(self):
        # try to re-use a server port if possible
        try:
            self.socket.setsockopt(
                socket.SOL_SOCKET, socket.SO_REUSEADDR,
                self.socket.getsockopt(socket.SOL_SOCKET,
                                       socket.SO_REUSEADDR) | 1
                )
        except OSError:
            pass

# ==================================================
    # predicates for select()
    # these are used as filters for the lists of sockets
    # to pass to select().
    # ==================================================

def readable(self):
        return True

def writable(self):
        return True

# ==================================================
    # socket object methods.
    # ==================================================

def listen(self, num):
        self.accepting = True
        if os.name == 'nt' and num > 5:
            num = 5
        return self.socket.listen(num)

def bind(self, addr):
        self.addr = addr
        return self.socket.bind(addr)

def connect(self, address):
        self.connected = False
        self.connecting = True
        err = self.socket.connect_ex(address)
        if err in (EINPROGRESS, EALREADY, EWOULDBLOCK) \
        or err == EINVAL and os.name == 'nt':
            self.addr = address
            return
        if err in (0, EISCONN):
            self.addr = address
            self.handle_connect_event()
        else:
            raise OSError(err, errorcode[err])

def accept(self):
        # XXX can return either an address pair or None
        try:
            conn, addr = self.socket.accept()
        except TypeError:
            return None
        except OSError as why:
            if why.args[0] in (EWOULDBLOCK, ECONNABORTED, EAGAIN):
                return None
            else:
                raise
        else:
            return conn, addr

def send(self, data):
        try:
            result = self.socket.send(data)
            return result
        except OSError as why:
            if why.args[0] == EWOULDBLOCK:
                return 0
            elif why.args[0] in _DISCONNECTED:
                self.handle_close()
                return 0
            else:
                raise

def recv(self, buffer_size):
        try:
            data = self.socket.recv(buffer_size)
            if not data:
                # a closed connection is indicated by signaling
                # a read condition, and having recv() return 0.
                self.handle_close()
                return b''
            else:
                return data
        except OSError as why:
            # winsock sometimes raises ENOTCONN
            if why.args[0] in _DISCONNECTED:
                self.handle_close()
                return b''
            else:
                raise

def close(self):
        self.connected = False
        self.accepting = False
        self.connecting = False
        self.del_channel()
        if self.socket is not None:
            try:
                self.socket.close()
            except OSError as why:
                if why.args[0] not in (ENOTCONN, EBADF):
                    raise

# log and log_info may be overridden to provide more sophisticated
    # logging and warning methods. In general, log is for 'hit' logging
    # and 'log_info' is for informational, warning and error logging.

def log(self, message):
        sys.stderr.write('log: %s\n' % str(message))

def log_info(self, message, type='info'):
        if type not in self.ignore_log_types:
            print('%s: %s' % (type, message))

def handle_read_event(self):
        if self.accepting:
            # accepting sockets are never connected, they "spawn" new
            # sockets that are connected
            self.handle_accept()
        elif not self.connected:
            if self.connecting:
                self.handle_connect_event()
            self.handle_read()
        else:
            self.handle_read()

def handle_connect_event(self):
        err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
        if err != 0:
            raise OSError(err, _strerror(err))
        self.handle_connect()
        self.connected = True
        self.connecting = False

def handle_write_event(self):
        if self.accepting:
            # Accepting sockets shouldn't get a write event.
            # We will pretend it didn't happen.
            return

if not self.connected:
            if self.connecting:
                self.handle_connect_event()
        self.handle_write()

def handle_expt_event(self):
        # handle_expt_event() is called if there might be an error on the
        # socket, or if there is OOB data
        # check for the error condition first
        err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
        if err != 0:
            # we can get here when select.select() says that there is an
            # exceptional condition on the socket
            # since there is an error, we'll go ahead and close the socket
            # like we would in a subclassed handle_read() that received no
            # data
            self.handle_close()
        else:
            self.handle_expt()

def handle_error(self):
        nil, t, v, tbinfo = compact_traceback()

# sometimes a user repr method will crash.
        try:
            self_repr = repr(self)
        except:
            self_repr = '<__repr__(self) failed for object at %0x>' % id(self)

self.log_info(
            'uncaptured python exception, closing channel %s (%s:%s %s)' % (
                self_repr,
                t,
                v,
                tbinfo
                ),
            'error'
            )
        self.handle_close()

def handle_expt(self):
        self.log_info('unhandled incoming priority event', 'warning')

def handle_read(self):
        self.log_info('unhandled read event', 'warning')

def handle_write(self):
        self.log_info('unhandled write event', 'warning')

def handle_connect(self):
        self.log_info('unhandled connect event', 'warning')

def handle_accept(self):
        pair = self.accept()
        if pair is not None:
            self.handle_accepted(*pair)

def handle_accepted(self, sock, addr):
        sock.close()
        self.log_info('unhandled accepted event', 'warning')

def handle_close(self):
        self.log_info('unhandled close event', 'warning')
        self.close()

# ---------------------------------------------------------------------------
# adds simple buffered output capability, useful for simple clients.
# [for more sophisticated usage use asynchat.async_chat]
# ---------------------------------------------------------------------------

class dispatcher_with_send(dispatcher):

def __init__(self, sock=None, map=None):
        dispatcher.__init__(self, sock, map)
        self.out_buffer = b''

def initiate_send(self):
        num_sent = 0
        num_sent = dispatcher.send(self, self.out_buffer[:65536])
        self.out_buffer = self.out_buffer[num_sent:]

def handle_write(self):
        self.initiate_send()

def writable(self):
        return (not self.connected) or len(self.out_buffer)

def send(self, data):
        if self.debug:
            self.log_info('sending %s' % repr(data))
        self.out_buffer = self.out_buffer + data
        self.initiate_send()

# ---------------------------------------------------------------------------
# used for debugging.
# ---------------------------------------------------------------------------

def compact_traceback():
    t, v, tb = sys.exc_info()
    tbinfo = []
    if not tb: # Must have a traceback
        raise AssertionError("traceback does not exist")
    while tb:
        tbinfo.append((
            tb.tb_frame.f_code.co_filename,
            tb.tb_frame.f_code.co_name,
            str(tb.tb_lineno)
            ))
        tb = tb.tb_next

# just to be safe
    del tb

file, function, line = tbinfo[-1]
    info = ' '.join(['[%s|%s|%s]' % x for x in tbinfo])
    return (file, function, line), t, v, info

def close_all(map=None, ignore_all=False):
    if map is None:
        map = socket_map
    for x in list(map.values()):
        try:
            x.close()
        except OSError as x:
            if x.args[0] == EBADF:
                pass
            elif not ignore_all:
                raise
        except _reraised_exceptions:
            raise
        except:
            if not ignore_all:
                raise
    map.clear()

# Asynchronous File I/O:
#
# After a little research (reading man pages on various unixen, and
# digging through the linux kernel), I've determined that select()
# isn't meant for doing asynchronous file i/o.
# Heartening, though - reading linux/mm/filemap.c shows that linux
# supports asynchronous read-ahead.  So _MOST_ of the time, the data
# will be sitting in memory for us already when we go to read it.
#
# What other OS's (besides NT) support async file i/o?  [VMS?]
#
# Regardless, this is useful for pipes, and stdin/stdout...

if os.name == 'posix':
    class file_wrapper:
        # Here we override just enough to make a file
        # look like a socket for the purposes of asyncore.
        # The passed fd is automatically os.dup()'d

def __init__(self, fd):
            self.fd = os.dup(fd)

def __del__(self):
            if self.fd >= 0:
                warnings.warn("unclosed file %r" % self, ResourceWarning,
                              source=self)
            self.close()

def recv(self, *args):
            return os.read(self.fd, *args)

def send(self, *args):
            return os.write(self.fd, *args)

def getsockopt(self, level, optname, buflen=None):
            if (level == socket.SOL_SOCKET and
                optname == socket.SO_ERROR and
                not buflen):
                return 0
            raise NotImplementedError("Only asyncore specific behaviour "
                                      "implemented.")

read = recv
        write = send

def close(self):
            if self.fd < 0:
                return
            fd = self.fd
            self.fd = -1
            os.close(fd)

def fileno(self):
            return self.fd

class file_dispatcher(dispatcher):

def __init__(self, fd, map=None):
            dispatcher.__init__(self, None, map)
            self.connected = True
            try:
                fd = fd.fileno()
            except AttributeError:
                pass
            self.set_file(fd)
            # set it to non-blocking mode
            os.set_blocking(fd, False)

def set_file(self, fd):
            self.socket = file_wrapper(fd)
            self._fileno = self.socket.fileno()
            self.add_channel()

cmd: