Välkommen till kursen!

Introduktion till dataimport i Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

Importera data

Flata filer, t.ex. .txt, .csv
Filer från annan programvara

ch_1_1_v2.004.png

Importera data

Flata filer, t.ex. .txt, .csv
Filer från annan programvara
Relationsdatabaser

ch_1_1_v2.005.png

Oformaterade textfiler

ch_1_1_v2.007.png

Tabelldata

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 Källa: Kaggle

Tabelldata

titanic.csv

titanic.csv med en markerad rad

Tabelldata

titanic.csv

titanic.csv med en markerad kolumn

Flat fil

Läsa en textfil

filename = 'huck_finn.txt'

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

text = file.read()

file.close()

Skriva ut en textfil

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.

Skriva till en fil

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

Kontexthanteraren 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.

I övningarna kommer du att:

Skriva ut filer till konsolen
Skriva ut specifika rader
Diskutera flata filer

Nu kör vi en övning!

Introduktion till dataimport i Python