title: Fetch all addresses holding an ERC20 token at a given timestamp
body: <p>I am trying to figure out how to do the following [in Python]:</p>
  <ul>
  <li>Fetch the address of all wallets holding a given ERC20 before a given date.</li>
  </ul>
  <p>EG: 'Get holdingAddresses from contractAddress before timestamp'</p>
  <p>I've looked at both the Ethplorer and Etherscan API's and I cannot figure out a way to retrieve this data.</p>
  <p>I think the answer may be through Infura, but I'm at a loss on where to start there if that is indeed the solution.</p>
  <p>Anyone know if this can be done, and if so - how?!</p>