OS Module

Comes with the anaconda install.

import os

name of operating system

We can get the operating system we're working on

1. **nt** is windows
2. **posix** is all unix based systems (Mac, Linux, ect)

Thrid would be java but not very common

print(os.name)

posix

Working directory

NOTE if working on windows need to store strings as \ for escape.

os.getcwd()

'/Users/charlesangione/git/machinelearningai'

print(os.getcwd())

/Users/charlesangione/git/machinelearningai

Contents of Directory

os.listdir('.')

['.DS_Store',
 'Object Orient Programming Theory.ipynb',
 'df.xlsx',
 'datasets',
 'Flow Control.ipynb',
 's1000DAnalysis.ipynb',
 'intro2JupyterNotebooks.ipynb',
 'OS Module.ipynb',
 '.gitignore',
 'NumPy.ipynb',
 '.ipynb_checkpoints',
 'User Defined Functions.ipynb',
 '.git',
 'Pandas.ipynb',
 'dfElements.xlsx',
 'Regular Expressions.ipynb']

#os.listdir('/users/username/git')

make and rename directory

#os.mkdir()
#os.rename

create and edit

#Note OS directory not needed. Can be done in base python.
#file = open('somefile','w')
#file.write('hello\n')
#file.writ4e('world!')
#file.close()