pandas :`item`已被弃用 [英] Pandas: `item` has been deprecated

问题描述

到目前为止，我在这里使用了以下代码行:

So far I used this line of code here:

max_total_gross = event_data["max_total_gross"].loc[event_data["event_id"] == event_id].item()

自从我更新熊猫以来，我收到未来的警告:

Since I updated Pandas I receive the future warning:

/opt/conda/lib/python3.7/site-packages/ipykernel_launcher.py:12: FutureWarning:已弃用item，并将在 sys.path [0] ==''的将来版本:

/opt/conda/lib/python3.7/site-packages/ipykernel_launcher.py:12: FutureWarning: item has been deprecated and will be removed in a future version if sys.path[0] == '':

我试图用这种方式修复它，但是结果不一样:

I tried to fix it that way, but it's not the same outcome:

event_data.loc[event_data.event_id == event_id, 'max_total_gross']

我希望有一个整数.

推荐答案

如果需要第一个匹配的值，请将iter与next一起使用，优点是如果没有匹配的值则返回默认值:

If need first matched value use iter with next, advantage is if no value is matched is returned default value:

s = event_data.loc[event_data.event_id == event_id, 'max_total_gross']

out = next(iter(s), 'no match')
print (out)

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