writing a script to examine dead tuples

Can anyone help me, i am trying to carry out an investigation
which involves accessing dead tuples within the postgresql.

I have been advised i could write a script that allows me to
examine dead tuples and am seeking advise on how to achieve this,
or pointers that can help me going in the right direction. I am
relatively new to this forum and postgresql and have been
assigned postgresql as a topic within my studies which as lead me to
creating a script to perform this task.

If anyone can help me i would be really grateful.

Thanks
Aaron

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