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Python Build a Soccer League

Posted by leonardorubiano
leonardorubiano
9,005 Points

TypeError: 'NoneType' is not subscriptable

I have a created each team as a dictionary, with one of the keys being "members" whose initial value is an empty key. Within my member assignment function, I am trying to append a player to the "members" list for that team, but getting the aforementioned error. When I try to debug using pdb, I can see that the variables in question aren't empty variables, and manually doing team['members'].append(player) seems to work. Any thoughts as to where I might be going wrong? Full function below:

def assign_member(player, teams):
    team = find_team(player, teams) # returns an available team
    #import pdb; pdb.set_trace()
    team['members'].append(player) # this line seems to be the issue
    player['team'] = team['name']
    if player['experience'] == True:
        team['experienced_members'] += 1
    if len(team['members']) == 6:
        team['full'] = True
        available_teams.remove(team)

1 Answer

Steven Parker
Steven Parker
229,785 Points
Steven Parker
Steven Parker
229,785 Points

Boy, it's sure hard to read Python without indenting! Follow the instructions below in the Markdown Cheatsheet for blockquoting code. :arrow_heading_down:

But it will take more of the code to reveal the problem. From what you have here, it seems that either the values being passed to assign_member or the function of find_team are causing "team" to be set to None on the first line of the function. Then, when it gets down to where it tries to subscript team with 'members', you see the error.

leonardorubiano
leonardorubiano
9,005 Points

Hi Steven,

Thanks for your answer! I'll look into it a bit more. And I hadn't seen the Markdown sheet, I'll definitely use it in the future.

leonardorubiano
leonardorubiano
9,005 Points

The issue was with the find_team function; I need to rethink how to return an appropriate team.