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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def connect(self, slot):
 """ Connects the signal to any callable object """

        if not callable(slot):
            raise ValueError("Connection to non-callable '%s' object failed" % slot.__class__.__name__)

        if (isinstance(slot, partial) or '<' in slot.__name__):
            # If it's a partial or a lambda. The '<' check is the only py2 and py3 compatible way I could find
            if slot not in self._slots:
                self._slots.append(slot)
        elif inspect.ismethod(slot):
            # Check if it's an instance method and store it with the instance as the key
            slotSelf = slot.__self__
            slotDict = weakref.WeakKeyDictionary()
            slotDict[slotSelf] = slot.__func__
            if slotDict not in self._slots:
                self._slots.append(slotDict)
        else:
            # If it's just a function then just store it as a weakref.
            newSlotRef = weakref.ref(slot)
            if newSlotRef not in self._slots:
                self._slots.append(newSlotRef)