'format: [(<price>, <depth>), (<price>, <depth>), ...]
:return: The depth profile
:rtype: list'

def get_bid_side_depth_profile(self, price_wallet_id, quantity_wallet_id):

    profile = []
    for (key, value) in self._bids.get_price_level_list(price_wallet_id, quantity_wallet_id).items():
        profile.append((key, value.depth))
    return profile
