{"id":18407,"date":"2022-10-31T14:08:14","date_gmt":"2022-10-31T08:38:14","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-parse-a-file-matching-all-the-lines-for-a-string-and-keep-track-of-count\/"},"modified":"2022-10-31T14:08:14","modified_gmt":"2022-10-31T08:38:14","slug":"solved-how-to-parse-a-file-matching-all-the-lines-for-a-string-and-keep-track-of-count","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-parse-a-file-matching-all-the-lines-for-a-string-and-keep-track-of-count\/","title":{"rendered":"[Solved] How to parse a file matching all the lines for a string and keep track of count?"},"content":{"rendered":"

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    \n
  1. Open the file and read all lines <\/li>\n<\/ol>\n
    with open(\"file.txt\") as f:  \n    lines = f.read().splitlines()\n<\/code><\/pre>\n
      \n
    1. Make a list of lines that contain the word “Error”  <\/li>\n<\/ol>\n
      data = [ line.lstrip('<').rstrip('>').split('><') for line in lines if 'Error' in line  ]\n<\/code><\/pre>\n
        \n
      1. Get the time and message items from the data<\/code> list  <\/li>\n<\/ol>\n
        errors = [ { 'time' : line[0], 'message': line[-1] } for line in data ]  \n<\/code><\/pre>\n
          \n
        1. Sort the errors<\/code> list by ‘time’ in descending order  <\/li>\n<\/ol>\n
          errors.sort(key=lambda e : e['time'], reverse=True)  \n<\/code><\/pre>\n
          Note that errors<\/code> is a list of dictionaries, you can use lists if you like.
          \nIf you want to print the results :  <\/p>\n
          print '\\n'.join( 'Time {:8} Error {}'.format(e['time'], e['message']) for e in errors )\n<\/code><\/pre>\n
          Output :  <\/p>\n
          Time: 4:02   Error: Error message1\nTime: 14:13  Error: Error message2\n<\/code><\/pre>\n<\/p><\/div>\n
          <\/div>\n<\/div>\n
                      5<\/span> <\/p><\/div>\n<\/div>\n
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          solved How to parse a file matching all the lines for a string and keep track of count? <\/p>\n","protected":false},"excerpt":{"rendered":"
          [ad_1] Open the file and read all lines with open(“file.txt”) as f: lines = f.read().splitlines() Make a list of lines that contain the word “Error” data = [ line.lstrip(‘<‘).rstrip(‘>’).split(‘><‘) for line in lines if ‘Error’ in line ] Get the time and message items from the data list errors = [ { ‘time’ : line[0], … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[349],"class_list":["post-18407","post","type-post","status-publish","format-standard","hentry","category-solved","tag-python"],"yoast_head":"\n[Solved] How to parse a file matching all the lines for a string and keep track of count? - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-how-to-parse-a-file-matching-all-the-lines-for-a-string-and-keep-track-of-count\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to parse a file matching all the lines for a string and keep track of count? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Open the file and read all lines with open("file.txt") as f: lines = f.read().splitlines() Make a list of lines that contain the word “Error” data = [ line.lstrip('<').rstrip('>').split('><') for line in lines if 'Error' in line ] Get the time and message items from the data list errors = [ { 'time' : line[0], ... 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