{"id":38880,"date":"2019-10-31T22:26:31","date_gmt":"2019-10-31T19:26:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii\/"},"modified":"2019-10-31T22:26:31","modified_gmt":"2019-10-31T19:26:31","slug":"nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii","title":{"rendered":"Egy Python-szkript hib\u00e1ja t\u00f6bb mint 100 k\u00e9miai publik\u00e1ci\u00f3ban hib\u00e1s eredm\u00e9nyekhez vezethetett.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A hawaii egyetem doktorandusz hallgat\u00f3ja felfedezett<\/a><\/noindex> probl\u00e9ma a Python szkripttel, amelyet a sz\u00e1m\u00edt\u00e1sokhoz haszn\u00e1lnak k\u00e9miai eltol\u00f3d\u00e1s<\/a><\/noindex>, amely meghat\u00e1rozza a vizsg\u00e1lt anyag k\u00e9miai szerkezet\u00e9t spektr\u00e1lis jelanal\u00edzis sor\u00e1n magnetikus rezonancia<\/a><\/noindex>. Egy professzor\u00e1nak kutat\u00e1si eredm\u00e9nyeinek ellen\u0151rz\u00e9se sor\u00e1n a doktorandusz \u00e9szrevette, hogy a szkript v\u00e9grehajt\u00e1sa k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerekben ugyanazzal az adathalmazon elt\u00e9r\u0151 eredm\u00e9nyeket hozott.<\/p>\n

P\u00e9ld\u00e1ul a macOS 10.14 \u00e9s az Ubuntu 16.04 rendszer\u00e9n a tesztelt adathalmazon a szkript helytelen kimeneti \u00e9rt\u00e9ket adott, 172,4-et 173,2 helyett. A szkript k\u00f6r\u00fclbel\u00fcl 1000 sor k\u00f3dot tartalmaz \u00e9s 2014 \u00f3ta haszn\u00e1lj\u00e1k a vegy\u00e9szek.<\/a><\/noindex> A k\u00f3d vizsg\u00e1lata megmutatta, hogy a helytelen \u00e9rt\u00e9k kimeneti eredm\u00e9nye az elt\u00e9r\u0151 f\u00e1jlsorol\u00e1s okozta a k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerekben. A szkript szerz\u0151i azt felt\u00e9telezt\u00e9k, hogy a \"<\/a><\/noindex> a f\u00e1jlok k\u00fcl\u00f6nbs\u00e9gei a k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerekben. A szkript \u00edr\u00f3i \u00fagy v\u00e9lt\u00e9k, hogy a \"\" funkci\u00f3 mindig n\u00e9v szerint rendszerezi a f\u00e1jlokat, m\u00edg a glob dokument\u00e1ci\u00f3j\u00e1ban szerepel, hogy a kimeneti sorrend nem garant\u00e1lt. A hiba jav\u00edt\u00e1sa annyib\u00f3l \u00e1llt, hogy a glob() megh\u00edv\u00e1sa ut\u00e1n hozz\u00e1adt\u00e1k a list_of_files.sort()-ot.<\/a><\/noindex>\" mindig n\u00e9v szerint rendezett f\u00e1jlokat ad vissza, m\u00edg a glob dokument\u00e1ci\u00f3j\u00e1ban az \u00e1ll, hogy a kimeneti sorrend nem garant\u00e1lt. A jav\u00edt\u00e1s az glob() h\u00edv\u00e1sa ut\u00e1n a list_of_files.sort() hozz\u00e1ad\u00e1s\u00e1ra szor\u00edtkozott.<\/p>\n

\"Egy<\/a><\/noindex><\/center><\/p>\n

A pontos sz\u00e1m\u00fa kutat\u00e1s, amelyben a szkriptet haszn\u00e1lt\u00e1k, nem ismert, de a k\u00f3dot tartalmaz\u00f3 publik\u00e1ci\u00f3t 158 dolgozat id\u00e9zi. A munk\u00e1k szerz\u0151inek aj\u00e1nlott\u00e1k, hogy \u00e9rt\u00e9kelj\u00e9k a szkript m\u0171k\u00f6d\u00e9s\u00e9nek helyess\u00e9g\u00e9t az alkalmazott oper\u00e1ci\u00f3s rendszerek alapj\u00e1n, \u00e9s v\u00e9gezzenek \u00fajrasz\u00e1m\u00edt\u00e1st, hogy megbizonyosodjanak a sz\u00e1m\u00edtott \u00e9rt\u00e9kek helyess\u00e9g\u00e9r\u0151l. Az eset kiv\u00e1l\u00f3 p\u00e9ld\u00e1ja annak, hogy nemcsak a k\u00eds\u00e9rlet v\u00e9grehajt\u00e1s\u00e1nak min\u0151s\u00e9ge, hanem az adatok programokban val\u00f3 helyes feldolgoz\u00e1sa is, amelyek eddig sz\u00e9les k\u00f6rben haszn\u00e1ltak, befoly\u00e1solhatja a v\u00e9gs\u0151 eredm\u00e9nyt.
\nA hawaii egyetem doktorandusz hallgat\u00f3ja probl\u00e9m\u00e1t fedezett fel.<\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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