Hello, 
I'm currently discovering otree. First of all, thanks a lot for all the help I found on this forum!

While coding my app, I encountered some troubles with the Admin report.
I've read the doc here: https://otree.readthedocs.io/es/latest/admin.html#admin-reports

In the subsession class, I have created this function :
class Subsession(BaseSubsession):
    def vars_for_admin_report(self):
        players = self.get_players()
        return dict(
            total_players = len(players),
        )

And in my admin_report.html, for now, i've just written this to test my code :
<p>Total players : {{ total_players }}</p>

However I end up with this issue:
otree.templating.errors.UndefinedVariable: Cannot resolve the variable 'total_players' (line 3, in "total_players")

Am I missing something here? Should I put my function vars_for_admin_report somewhere else?

Thanks for your help

Your method needs to be placed without an indent, not part of the class Subsession.

The way you coded it, it won't get called.

Hello Daniel_Frey, thanks a lot, it worked