Welcome to the course!

Introduction to Importing Data in Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

Import data

Flat files, e.g. .txts, .csvs
Files from other software

ch_1_1_v2.004.png

Import data

Flat files, e.g. .txts, .csvs
Files from other software
Relational databases

ch_1_1_v2.005.png

Plain text files

ch_1_1_v2.007.png

Table 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 Source: Kaggle

Table data

titanic.csv

titanic.csv with a row highlighted

Table data

titanic.csv

titanic.csv with a column highlighted

Flat file

Reading a text file

filename = 'huck_finn.txt'

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

text = file.read()

file.close()

Printing a text file

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.

Writing to a file

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

Context manager 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.

In the exercises, you’ll:

Print files to the console
Print specific lines
Discuss flat files

Let's practice!

Introduction to Importing Data in Python