Thanks for your work, it helped me to add this feature to beem. At the moment it is only used on https://api.hive.blog.

from beem import Hive
from beem.account import Account
hive = Hive("https://api.hive.blog")
account = Account("miniature-tiger", blockchain_instance=hive)
votes = list(account.history_reverse(stop=-1000, use_block_num=False, only_ops=["vote"]))

This returns all votes in the last 1000 account operations using operation_filter_low and operation_filter_high. The numbers are calculated in:

operation_filter_low, operation_filter_high = account._get_operation_filter(only_ops=["vote"])