AtBS 8: Reading and Writing Files

Question 1

What does cwd stand for?

Answer 1

Current Working Directory

Question 2

How to return the file path for the current working directory in the interactive shell?

Answer 2

os.getcwd()

Question 3

How to change the current working directory in the interactive shell?

Answer 3

os.chdir( NEW FILE PATH)

Question 4

How to create a new folder?

Example

Answer 4

os.makedirs (FILEPATH)

import os

os.makedirs(‘C:\delicious\walnut\waffles’)

Question 5

How to open a file example?

Answer 5

helloFile = open (‘C:\TestFolder\HelloWorld.txt’)

type hello file on the next window

Question 6

How to read a file example?

Answer 6

helloContent = helloFile.read()

type helloContent in on next line

Question 7

How to read a file by separate lines?

Answer 7

helloContent = helloFile .readlines()

Question 8

How to write to a file?

Answer 8

When you open a file specify write with a “w” after the text file you want to open

ex.
baconFile = open (‘bacon.txt.’,’w’)

Question 9

How to append to a file?

Answer 9

When you open a file specify append with a “a” after the text file you want to open

ex.

baconFile = open (‘bacon.txt’,’a’)

Question 10

How to save variables in Python?

Answer 10

Use the shelve module.

pg 184

Question 11

Difference between absolute and relative paths to files?

Answer 11

Absolute always begins with the root folder

Relative path only begins with the current working directory