Trying to figure out the right way to get the latest entry for a key

get-latest.py

import iroh
import time

node = iroh.IrohNode("./iroh_data")
author1 = node.author_create()
author2 = node.author_create()
doc = node.doc_create()

key = b'our_key'
other_key = b'some_other_key'

ts1 = 'earliest'.encode('utf-8')
print(f"ts1: {ts1}")
doc.set_bytes(author1, key, ts1)
doc.set_bytes(author1, other_key, ts1)

time.sleep(1)

ts2 = 'latest'.encode('utf-8')
print(f"ts2: {ts2}")
doc.set_bytes(author2, key, ts2)

q1 = iroh.Query.key_exact(key, None).single_latest_per_key(None)
e = doc.get_one(q1)
print("q1: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q1aopts = iroh.QueryOptions(sort_by=iroh.SortBy.KEY_AUTHOR, direction=iroh.SortDirection.ASC, offset=0, limit=0)
q1a = iroh.Query.key_exact(key, None).single_latest_per_key(None)
e = doc.get_one(q1a)
print("q1a: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q1bopts = iroh.QueryOptions(sort_by=iroh.SortBy.KEY_AUTHOR, direction=iroh.SortDirection.ASC, offset=0, limit=0)
q1b = iroh.Query.key_exact(key, None).single_latest_per_key(None)
e = doc.get_one(q1b)
print("q1b: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q2 = iroh.Query.single_latest_per_key(None).key_exact(key, None)
e = doc.get_one(q2)
print("q2: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q2aopts = iroh.QueryOptions(sort_by=iroh.SortBy.AUTHOR_KEY, direction=iroh.SortDirection.ASC, offset=0, limit=0)
q2a = iroh.Query.single_latest_per_key(q2aopts).key_exact(key, None)
e = doc.get_one(q2a)
print("q2a: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q2bopts = iroh.QueryOptions(sort_by=iroh.SortBy.AUTHOR_KEY, direction=iroh.SortDirection.DESC, offset=0, limit=0)
q2b = iroh.Query.single_latest_per_key(q2bopts).key_exact(key, None)
e = doc.get_one(q2b)
print("q2b: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q3 = iroh.Query.single_latest_per_key(None).key_exact(key, None)
res = doc.get_many(q3)
for e in res:
    print("q3: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))

q4 = iroh.Query.key_exact(key, None).single_latest_per_key(None)
res = doc.get_many(q4)
for e in res:
    print("q4: %s: %s" % (e.key().decode('utf-8'), e.content_bytes(doc).decode('utf-8')))