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- import pandas as pd
- if __name__ == "__main__":
- path = "CHARLS_data_pollutants.csv"
- data = pd.read_csv(path, encoding="utf-8")
- print(data.info())
- data["born_year"] = data.groupby("ID")["born_year"].transform(lambda x : x.fillna(x.mean()))
- data["age"] = data["wave"] - data["born_year"]
- data.to_csv("CHARLS_data_pollutants_born.csv", encoding="utf-8")
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