code: def get_block_height(block_hash, coin_symbol='btc', api_key=None):
      '''
      Takes a block_hash and returns the block_height
      '''
      return get_block_overview(block_representation=block_hash,
              coin_symbol=coin_symbol, txn_limit=1, api_key=api_key)['height'f get_block_height(block_hash, coin_symbol='btc', api_key=None):
      '''
      Takes a block_hash and returns the block_height
      '''
      return get_block_overview(block_representation=block_hash,
              coin_symbol=coin_symbol, txn_limit=1, api_key=api_key)['height']
docs: Takes a block_hash and returns the block_height