If anyone happens to read this

I would ask them to consider the following.
If you are a resident of Wentworth and voting on Saturday then it is even more important.
Your local member of parliament is elected to represent you. He or she is not elected to be a Minister or Prime Minister. There is a contract between that person and you. It is not a contract which should be broken lightly. Please do not reward a dummy spit by failing to replace that person with a member from another party. It will simply encourage such behaviour in future.
I also say this to the member of parliament. If the people of your electorate are not happy with your performance they can oust you at the next election. You can offer to resign earlier but the cost of doing so should be borne by you and it is up to you to strongly support any new candidate for the sake of stability in government.
Apart from that the only reasons for a by election should be for an illness so severe you cannot carry on, death, or some misconduct  which would disqualify all members of parliament.
Losing the job of Prime Minister is no reason to not see your term in parliament to the end of that parliament. You do not need to stand for re-election but you should remain there. It is what more than one ousted Prime Minister has done in recent years. No, it isn't comfortable to go and sit on the back benches but, while there, consider what you have done to find yourself there.
Being Prime Minister is not simply about "leading" it is also about "listening".  It is not simply about bringing in your policies but the policies of the party you lead. Those policies are made by the party you lead, not by you. If you don't like something work to get it changed. Don't undermine the government of the day.
To everyone else....
can you tell I am fed up? There is a totally unnecessary by-election coming up on Saturday.  It will almost certainly cause a seismic shift in politics, one that will do the country harm as the elected government will not be able to govern effectively. It has been caused by the selfishness of one man who is sulking because what he once did to someone else has now been done to him. 
The contract between politicians and the rest of us needs to be taken much more seriously than it is. There need to be consequences for breaking it.