{"id":222,"date":"2021-08-18T18:19:01","date_gmt":"2021-08-18T18:19:01","guid":{"rendered":"https:\/\/www.jibsheet.net\/linux\/?p=222"},"modified":"2021-08-18T18:20:40","modified_gmt":"2021-08-18T18:20:40","slug":"using-pandas-append-on-groups-of-csv-files","status":"publish","type":"post","link":"https:\/\/www.jibsheet.net\/linux\/index.php\/2021\/08\/18\/using-pandas-append-on-groups-of-csv-files\/","title":{"rendered":"Using Pandas append on groups of CSV files"},"content":{"rendered":"<p>This function loads a series of daily csv files and combines them into a monthly dataframe<\/p>\n<ol>\n<li>\u00a0Create an empty Pandas DataFrame<\/li>\n<li>\u00a0append to empty DataFrame after each load.<\/li>\n<\/ol>\n<p>Word of caution &#8211; the columns must be the same for all inputs.<\/p>\n<p>One should test the columns to make sure you get what you expect.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-highlight=\"3,8\">def load_monthly_noaa_csv_files( dir, noaa_station, ext = \"csv\", tyear=2021, tmonth=0):\r\n    file_list = gather_monthly_noaa_files( dir, noaa_station, ext, tyear, tmonth)\r\n    month_df = pd.DataFrame()\r\n    if len(file_list) &gt; 0:\r\n        for f in file_list:\r\n            obs1 = read_weather_obs_csv( f )\r\n            print(obs1.head())\r\n            month_df = month_df.append(obs1,ignore_index=True)\r\n    return month_df<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This function loads a series of daily csv files and combines them into a monthly dataframe \u00a0Create an empty Pandas DataFrame \u00a0append to empty DataFrame after each load. Word of caution &#8211; the columns must be the same for all inputs. One should test the columns to make sure you get what you expect. def load_monthly_noaa_csv_files( dir, noaa_station, ext = [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7],"tags":[23,10],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Using Pandas append on groups of CSV files - Jon Allen&#039;s Linux Stuff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jibsheet.net\/linux\/index.php\/2021\/08\/18\/using-pandas-append-on-groups-of-csv-files\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using Pandas append on groups of CSV files - Jon Allen&#039;s Linux Stuff\" \/>\n<meta property=\"og:description\" content=\"This function loads a series of daily csv files and combines them into a monthly dataframe \u00a0Create an empty Pandas DataFrame \u00a0append to empty DataFrame after each load. 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