出现KeyError: "['date'] not found in axis"报错

df_uvpd = data1[['user_id','date']].groupby('date').nunique()
df_uvpd = df_uvpd.drop(columns='date')
df_uvpd = df_uvpd.rename(columns={"user_id": "uv"})

出现了KeyError: "['date'] not found in axis"
报错

你第1行groupby和nunique之后变成一个series了，试一下下面的代码

df_uvpd = data1[['user_id','date']].groupby('date').nunique()

df_uvpd  = pd.DataFrame(df_uvpd).reset_index()

df_uvpd = df_uvpd.drop(columns='date')
df_uvpd = df_uvpd.rename(columns={"user_id": "uv"})