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Úvod do importu dat v Pythonu

Hugo Bowne-Anderson

Data Scientist at DataCamp

Import dat

Ploché soubory, např. .txt, .csv
Soubory z jiného softwaru

ch_1_1_v2.004.png

Import dat

Ploché soubory, např. .txt, .csv
Soubory z jiného softwaru
Relační databáze

ch_1_1_v2.005.png

Soubory s prostým textem

ch_1_1_v2.007.png

Tabulková data

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 Zdroj: Kaggle

Tabulková data

titanic.csv

titanic.csv se zvýrazněným řádkem

Tabulková data

titanic.csv

titanic.csv se zvýrazněným sloupcem

Plochý soubor

Čtení textového souboru

filename = 'huck_finn.txt'

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

text = file.read()

file.close()

Výpis textového souboru

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.

Zápis do souboru

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

Kontextový správce 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.

V cvičeních budete:

Výpis souborů do konzole
Výpis konkrétních řádků
Práce s plochými soubory

Pojďme cvičit!

Úvod do importu dat v Pythonu