Are Ethereum block numbers consecutive from genesis 0 ... Latest?

Question

If I use w3.eth.getBlock('latest').number to get the latest block_number, will 0 ... block_number include the entire universe of Ethereum blocks? This answer seems to suggest this is the way to get a wallet's transaction history.

results = {}        
block_latest = w3.eth.getBlock('latest').number
for block_item in range(0,int(block_latest)):
    # check each block for matching transactions
    # and return them in result
    results[block] = result

Answer 1

Yes, block numbers are consecutive on the Ethereum blockchain. To get a wallets history without libraries or APIs you would have to loop through every block but a better alternative (as Frank said in comments) is to use the Etherscan API. The API call will probably look like:

https://api.etherscan.io/api
   ?module=account
   &action=txlist
   &address=0xddbd2b932c763ba5b1b7ae3b362eac3e8d40121a
   &startblock=0
   &endblock=99999999
   &page=1
   &offset=10
   &sort=asc
   &apikey=YourApiKeyToken