The new Python-Steem 0.4 is out, but I think it could use more examples.
As I try out the new functions, I thought it would be helpful, to post some working code.

This script uses the classes _Account_ and _Amount_ that were part oft steemtools by @furion.

The longest part was to build the url.

# Code

    from steem import Steem
    steem = Steem(node="wss://node.steem.ws") #temporary fix (usually: wss://this.piston.rocks )
    from steem.account import Account
    from steem.amount import Amount

    account = Account("felixxx")

    best = 0

    for event in account.history(filter_by='curation_reward'): 
        reward = account.converter.vests_to_sp(Amount(event['reward']).amount)
        if reward > best:
            best = reward
            link = ("https://steemit.com/tag/@" + event['comment_author'] + '/' + event['comment_permlink'])

    print('\nYour curation-highscore: ' + str(best) + ' SP\nfor ' + link +'\n')
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## Just replace _felixxx_ with your account name and run.

___

# Result*
http://i.imgur.com/kuaiRkN.png

<sub>*The curation reward shown in Steem Power might be slightly wrong, since the script uses the reward VEST values</sub>