熊猫-数据框之间的映射ID

Question

我需要映射两个数据框。

df_players：

name            711 non-null object
player_id       711 non-null int64
round_id       711 non-null int64
team_id         711 non-null int64

df_games：

game_id         10 non-null int64
team_home_id    10 non-null int64
team_away_id    10 non-null int64

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现在我需要将信息从df_games带到我的df_players，如果团队参加比赛，则将值增加1；如果团队参加比赛，则将值增加0。

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我正在尝试在df_players上添加一列首页，然后单独添加一列，

df_players['home'] = df_players['team_id'].map(df_games['team_home_id'])
df_players['away'] = df_players['team_id'].map(df_games['team_away_id'])

但是我得到了所有NaN。

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我如何达到我想要的结果？

Answer 1

这不是地图，请检查isin

df_players['home'] = df_players['team_id'].isin(df_games['team_home_id'])
df_players['away'] = df_players['team_id'].isin(df_games['team_away_id'])