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Введение в импорт данных в Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

Импорт данных

Плоские файлы, например .txt, .csv
Файлы из других программ

ch_1_1_v2.004.png

Импорт данных

Плоские файлы, например .txt, .csv
Файлы из других программ
Реляционные базы данных

ch_1_1_v2.005.png

Текстовые файлы

ch_1_1_v2.007.png

Табличные данные

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 Источник: Kaggle

Табличные данные

titanic.csv

titanic.csv с выделенной строкой

Табличные данные

titanic.csv

titanic.csv с выделенным столбцом

Плоский файл

Чтение текстового файла

filename = 'huck_finn.txt'

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

text = file.read()

file.close()

Вывод текстового файла

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.

Запись в файл

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

Контекстный менеджер 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.

В упражнениях вы:

Вывод файлов в консоль
Вывод отдельных строк
Работа с плоскими файлами

Давайте потренируемся!

Введение в импорт данных в Python