{"id":102913,"date":"2022-01-08T15:37:07","date_gmt":"2022-01-08T13:37:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d0%b2-3-6-%d0%bf%d1%80%d0%be%d1%82%d0%b5%d1%81%d1%82%d0%b8%d1%80%d0%be%d0%b2%d0%b0%d0%bd%d0%bd%d1%8b%d1%85-python-%d1%80%d0%b5%d0%bf%d0%be%d0%b7%d0%b8%d1%82%d0%be%d1%80%d0%b8%d0%b5%d0%b2-%d0%b2%d1%8b"},"modified":"2022-01-08T15:37:07","modified_gmt":"2022-01-08T13:37:08","slug":"%d0%b2-3-6-%d0%bf%d1%80%d0%be%d1%82%d0%b5%d1%81%d1%82%d0%b8%d1%80%d0%be%d0%b2%d0%b0%d0%bd%d0%bd%d1%8b%d1%85-python-%d1%80%d0%b5%d0%bf%d0%be%d0%b7%d0%b8%d1%82%d0%be%d1%80%d0%b8%d0%b5%d0%b2-%d0%b2%d1%8b","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/%d0%b2-3-6-%d0%bf%d1%80%d0%be%d1%82%d0%b5%d1%81%d1%82%d0%b8%d1%80%d0%be%d0%b2%d0%b0%d0%bd%d0%bd%d1%8b%d1%85-python-%d1%80%d0%b5%d0%bf%d0%be%d0%b7%d0%b8%d1%82%d0%be%d1%80%d0%b8%d0%b5%d0%b2-%d0%b2%d1%8b","title":{"rendered":"I 3,6% af de testede Python-repositorier er der fundet fejl relateret til manglende kommaer","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Resultaterne af en unders\u00f8gelse om Python-kodes s\u00e5rbarhed over for fejl relateret til forkert brug af kommaer i koden er offentliggjort. Problemerne skyldes, at Python automatisk sammenk\u00e6der strenge i en liste, hvis de ikke er adskilt af kommaer, samt at det behandler v\u00e6rdien som et tuple, hvis der efter v\u00e6rdien f\u00f8lger et komma. Gennem en automatiseret analyse af 666 GitHub-repositorier med Python-kode fandt forskerne mulige problemer med kommaer i 5% af de unders\u00f8gte projekter.      <\/p>\n<p>En videre manuel kontrol viste, at de faktiske fejl kun forekom i 24 repository'er (3,6 %), mens de resterende 1,4 % var falske positiver (for eksempel kunne et komma med vilje v\u00e6re udeladt mellem linjer for at kombinere filer, der var brudt op p\u00e5 flere linjer, lange hashes, HTML-blokke eller SQL-udtryk). Bem\u00e6rkelsesv\u00e6rdigt er det, at de 24 repository'er med faktiske fejl inkluderede store projekter som Tensorflow, Google V8, Sentry, Pydata xarray, rapidpro, django-colorfield og django-helpdesk. Desuden er problemer med kommaer ikke specifikke for Python og opst\u00e5r ofte i projekter p\u00e5 C\/C++ (for eksempel nylige rettelser \u2014 LLVM, Mono, Tensorflow).        <\/p>\n<p>De vigtigste typer fejl, der blev unders\u00f8gt:  <\/p>\n<ul>\n<li class=\"l\"> Et tilf\u00e6ldigt udeladt komma i lister, tuples og m\u00e6ngder, som medf\u00f8rer, at strenge kombineres i stedet for at blive fortolket som separate v\u00e6rdier. For eksempel i Sentry blev der i en af testene udeladt et komma mellem strenge \"releases\" og \"discover\" i listen, hvilket f\u00f8rte til kontrol af den ikke-eksisterende handler \"\\\/releasesdiscover\" i stedet for den separate kontrol af \"\\\/releases\" og \"\\\/discover\".    <center><img decoding=\"async\" alt=\"I 3,6% af de testede Python-repositorier er der fundet fejl relateret til manglende kommaer\" src=\"\/wp-content\/uploads\/2022\/01\/67b17b458cc6743b316dc67db72ed336.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>\n<p>Et andet eksempel \u2014 et udeladt komma i rapidpro f\u00f8rte til, at to forskellige regler blev kombineret i linje 572:  <center><img decoding=\"async\" alt=\"I 3,6% af de testede Python-repositorier er der fundet fejl relateret til manglende kommaer\" src=\"\/wp-content\/uploads\/2022\/01\/c2a9d6dbdde6965091b27217626ea6c9.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<li class=\"l\"> Et udeladt komma i slutningen af definitionen af en tuple med \u00e9t element, hvilket f\u00f8rer til, at der under tildeling bliver tildelt en almindelig datatype i stedet for en tuple. For eksempel vil udtrykket \"values = (1,)\" f\u00f8re til tildeling af en tuple med \u00e9t element, mens \"values = (1)\" vil f\u00f8re til tildeling af en heltalsdatatype. Parenteserne i de n\u00e6vnte tildelinger p\u00e5virker ikke datatype-definitionen og er valgfri, mens tilstedev\u00e6relsen af en tuple kun bestemmes af parseren baseret p\u00e5 tilstedev\u00e6relsen af kommaer.           REST_FRAMEWORK = {         'DEFAULT_PERMISSION_CLASSES': (             'rest_framework.permissions.IsAuthenticated' # i stedet for en tuple vil der blive tildelt en streng.         )     }\n<li class=\"l\"> Den omvendte situation \u2014 overfl\u00f8dige kommaer ved tildeling. Hvis der ved en fejl efterlades et komma i slutningen af en tildeling, vil der i stedet for en almindelig datatype blive tildelt en tuple (for eksempel, hvis \"value = 1\" er angivet som \"value = 1,\" ).      <\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56470\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u0434\u0430 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Python \u043e\u0448\u0438\u0431\u043a\u0430\u043c, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c \u0441 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0437\u0430\u043f\u044f\u0442\u044b\u0445 \u0432 \u043a\u043e\u0434\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432\u044b\u0437\u0432\u0430\u043d\u044b \u0442\u0435\u043c, \u0447\u0442\u043e \u043f\u0440\u0438 \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f\u0445 Python \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u0441\u043f\u0438\u0441\u043a\u0435, \u0435\u0441\u043b\u0438 \u043e\u043d\u0438 \u043d\u0435 \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u044b \u0437\u0430\u043f\u044f\u0442\u043e\u0439, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a\u0430\u043a \u043a\u043e\u0440\u0442\u0435\u0436, \u0435\u0441\u043b\u0438 \u043f\u043e\u0441\u043b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0437\u0430\u043f\u044f\u0442\u0430\u044f. \u041f\u0440\u043e\u0432\u0435\u0434\u044f \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0430\u043d\u0430\u043b\u0438\u0437 666 GitHub-\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0435\u0432 \u0441 \u043a\u043e\u0434\u043e\u043c \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Python, \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":102914,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u0434\u0430 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Python \u043e\u0448\u0438\u0431\u043a\u0430\u043c, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c 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