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Wprowadzenie do importowania danych w Pythonie

Hugo Bowne-Anderson

Data Scientist at DataCamp

Importowanie danych

Pliki płaskie, np. .txt, .csv
Pliki z innych programów

ch_1_1_v2.004.png

Importowanie danych

Pliki płaskie, np. .txt, .csv
Pliki z innych programów
Relacyjne bazy danych

ch_1_1_v2.005.png

Pliki zwykłego tekstu

ch_1_1_v2.007.png

Dane tabelaryczne

titanic.csv

                        Name      Sex  Cabin  Survived
     Braund, Mr. Owen Harris     male    NaN         0
  Cumings, Mrs. John Bradley   female    C85         1
      Heikkinen, Miss. Laina   female    NaN         1
Futrelle, Mrs. Jacques Heath   female   C123         1
    Allen, Mr. William Henry     male    NaN         0

¹ Źródło: Kaggle

Dane tabelaryczne

titanic.csv

titanic.csv z wyróżnionym wierszem

Dane tabelaryczne

titanic.csv

titanic.csv z wyróżnioną kolumną

Plik płaski

Odczytywanie pliku tekstowego

filename = 'huck_finn.txt'

file = open(filename, mode='r')  # 'r' is to read

text = file.read()

file.close()

Wyświetlanie pliku tekstowego

print(text)

YOU don't know about me without you have read a book by
the name of The Adventures of Tom Sawyer; but that 
ain't no matter. That book was made by Mr. Mark Twain,
and he told the truth, mainly. There was things which 
he stretched, but mainly he told the truth.  That is 
nothing. never seen anybody but lied one time or 
another, without it was Aunt Polly, or the widow, or 
maybe Mary. Aunt Polly--Tom's Aunt Polly, she is--and
Mary, and the Widow Douglas is all told about in that
book, which is mostly a true book, with some 
stretchers, as I said before.

Zapisywanie do pliku

filename = 'huck_finn.txt'
file = open(filename, mode='w')  # 'w' is to write
file.close()

Menedżer kontekstu with

with open('huck_finn.txt', 'r') as file:
    print(file.read())

YOU don't know about me without you have read a book by
the name of The Adventures of Tom Sawyer; but that 
ain't no matter. That book was made by Mr. Mark Twain,
and he told the truth, mainly. There was things which 
he stretched, but mainly he told the truth.  That is 
nothing. never seen anybody but lied one time or 
another, without it was Aunt Polly, or the widow, or 
maybe Mary. Aunt Polly--Tom's Aunt Polly, she is--and 
Mary, and the Widow Douglas is all told about in that 
book, which is mostly a true book, with some 
stretchers, as I said before.

W ćwiczeniach:

Wyświetlanie plików w konsoli
Wyświetlanie wybranych wierszy
Omówienie plików płaskich

Czas na ćwiczenia!

Wprowadzenie do importowania danych w Pythonie