January 2014
Intermediate to advanced
600 pages
14h 51m
Polish
Content preview from Python. Receptury. Wydanie IIIBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Rozdział 6. Kodowanie i przetwarzanie danych
Rozdział ten poświęcony jest przede wszystkim używaniu Pythona do przetwarzania danych zapisanych za pomocą różnego rodzaju popularnych kodowań, np. w plikach CSV, w formacie JSON albo XML lub w rekordach w postaci binarnej. W rozdziale tym (w odróżnieniu od rozdziału o strukturach danych) najważniejsze są nie konkretne algorytmy, ale problem pobierania i zapisywania danych w programach.
6.1. Wczytywanie i zapisywanie danych CSV
Problem
Programista chce wczytać lub zapisać dane w formacie CSV.
Rozwiązanie
Podczas pracy z większością rodzajów danych CSV należy korzystać z biblioteki csv. Załóżmy, że w pliku stocks.csv znajdują się dane na temat akcji spółek giełdowych:
Symbol,Price,Date,Time,Change,Volume ...
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