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Hi,
What specific data interests you? You can of course pull all data one by one from all blocks, but you can also use some specific calls to get certain type of data. Have you checked https://developers.hive.io for more documentations?

I want to work on my DPOS consensus algorithm for my master's thesis, and to examine this decentralization in this system. To do this, I need the information of all the blocks, and I also used the hive API. It's very time consuming and I also checked https://developers.hive.io in full. Please help me how to get block information quickly.

Most of the information is available in Hivemind, you will have to setup instance on your local machine (python + postgresql).

Can you help me how to set up (python + postgresql) on my local machine?