human
Write me a the Python code you requested given the following:
Complete the below
def connect(receiver, signal=Any, sender=Any, weak=True):

    ''''Connect receiver to sender for signal
    receiver -- a callable Python object which is to receive
    messages/signals/events.  Receivers must be hashable
    objects.
    if weak is True, then receiver must be weak-referencable
    (more precisely saferef.safeRef() must be able to create
    a reference to the receiver).
    Receivers are fairly flexible in their specification,
    as the machinery in the robustApply module takes care
    of most of the details regarding figuring out appropriate
    subsets of the sent arguments to apply to a given
    receiver.
    Note:
    if receiver is itself a weak reference (a callable),
    it will be de-referenced by the system\'s machinery,
    so *generally* weak references are not suitable as
    receivers, though some use might be found for the
    facility whereby a higher-level library passes in
    pre-weakrefed receiver references.
    signal -- the signal to which the receiver should respond
    if Any, receiver will receive any signal from the
    indicated sender (which might also be Any, but is not
    necessarily Any).
    Otherwise must be a hashable Python object other than
    None (DispatcherError raised on None).
    sender -- the sender to which the receiver should respond
    if Any, receiver will receive the indicated signals
    from any sender.
    if Anonymous, receiver will only receive indicated
    signals from send/sendExact which do not specify a
    sender, or specify Anonymous explicitly as the sender.
    Otherwise can be any python object.
    weak -- whether to use weak references to the receiver
    By default, the module will attempt to use weak
    references to the receiver objects.  If this parameter
    is false, then strong references will be used.
    returns None, may raise DispatcherTypeError'
    '''
assistant
#Here is the Python code you requested.
    if (signal is None):
        raise errors.DispatcherTypeError(('Signal    cannot    be    None    (receiver=%r    sender=%r)' % (receiver, sender)))
    if weak:
        receiver = saferef.safeRef(receiver, onDelete=_removeReceiver)
    senderkey = id(sender)
    if connections.has_key(senderkey):
        signals = connections[senderkey]
    else:
        connections[senderkey] = signals = {}
    if (sender not in (None, Anonymous, Any)):
        def remove(object, senderkey=senderkey):
            _removeSender(senderkey=senderkey)
        try:
            weakSender = weakref.ref(sender, remove)
            senders[senderkey] = weakSender
        except:
            pass
    receiverID = id(receiver)
    if signals.has_key(signal):
        receivers = signals[signal]
        _removeOldBackRefs(senderkey, signal, receiver, receivers)
    else:
        receivers = signals[signal] = []
    try:
        current = sendersBack.get(receiverID)
        if (current is None):
            sendersBack[receiverID] = current = []
        if (senderkey not in current):
            current.append(senderkey)
    except:
        pass
    receivers.append(receiver)