关于python：如何检查行的数据是否在np.where()内的列表中？

How to check whether data of a row is in list, inside of np.where()?

1
2
3

developed_countries = ["NOR","AUS","CHE","DEU","DNK","SGP","NLD","IRL","ISL","CAN","USA","NZL","SWE","LIE","GBR"]

recent_indicators['Developed'] = np.where(recent_indicators['CountryCode'] in developed_countries, 1, 0)

"ValueError: The truth value of a Series is ambiguous. Use a.empty,
a.bool(), a.item(), a.any() or a.all()."

最近的_下列指标是熊猫。什么是"countrycode替代检查如果是发达国家和在_？

相关讨论

您可以直接在熊猫过滤中使用.isin()。-

1	recent_indicators_filtered = recent_indicators[recent_indicators['CountryCode'].isin(developed_countries)]

另外，如果开发了一个Boolean列，它会显示True。-

1	recent_indicators['Developed'] = recent_indicators['CountryCode'].isin(developed_countries)