ETL_ENK_PROJECT Biz的ETL项目1)摘录 数据源1a)找到 (世界幸福报告)1b)找到 (世界人口报告) 然后在熊猫中读取csv,创建数据框2a)世界幸福报告world_happiness_df = pd.read_csv(csv_file)world_happiness_df.head()2b)世界人口报告csv_file2 =“ world_1.csv” worldPop_df = pd.read_csv(csv_file1,en ')worldPop_df.head() 提取所需的列3a)new_world_happiness_df = world_happiness_df [['总体排名','国家或地区','分数']]。copy()new_world_happiness_df.head(156)3b)new_world_pop_df = worldPop_d