It only took me 22 days to figure out ...

This was my issue:

https://github.com/steemit/steem-python/issues/9

In the commit.py it says:

For example, if we would like to split rewards between account1 and account2:

    beneficiaries = [
                     {'account': 'account1', 'weight': 5000},
                     {'account': 'account2', 'weight': 5000}
                    ]

And that doesn't work and it was driving me crazy.

This worked:

beneficiaries = [
                 OrderedDict('account': 'account1', 'weight': 5000),
                 OrderedDict('account': 'account2', 'weight': 5000)
                ]

( You need from collections import OrderedDict )

Now you can make a post with the beneficiaries argument.

I almost put a 100 SBD bounty on solving this issue.

For my report with @deutschbot, I use it like this:

bene_list = []
bene_weight = 10000 // len(mentioned_authors)
bene_rest = 10000 - (bene_weight * len(mentioned_authors))

for author in mentioned_authors:

    bene_dict = OrderedDict()
    bene_dict['account'] = author
    bene_dict['weight'] = bene_weight

    if author == report_author:
        
        bene_dict['weight'] = bene_weight + bene_rest

    bene_list.append(bene_dict)

Now you can

steem.post(
      title = 'My funky title', 
      body = beautiful_post, 
      author = 'beststeemitaccountever111', 
      tags = ['such', 'code', 'much', 'win']
      beneficiaries = bene_list)