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Introducere în importul datelor în Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

Importul datelor

Fișiere plate, ex. .txts, .csvs
Fișiere din alte programe

ch_1_1_v2.004.png

Importul datelor

Fișiere plate, ex. .txts, .csvs
Fișiere din alte programe
Baze de date relaționale

ch_1_1_v2.005.png

Fișiere text simplu

ch_1_1_v2.007.png

Date tabulare

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 Sursă: Kaggle

Date tabulare

titanic.csv

titanic.csv cu un rând evidențiat

Date tabulare

titanic.csv

titanic.csv cu o coloană evidențiată

Fișier plat

Citirea unui fișier text

filename = 'huck_finn.txt'

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

text = file.read()

file.close()

Afișarea unui fișier text

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.

Scrierea într-un fișier

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

Managerul de context 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.

În exerciții, veți:

Afișarea fișierelor în consolă
Afișarea unor linii specifice
Discuție despre fișiere plate

Să exersăm!

Introducere în importul datelor în Python