Python 3.*

Reference:

Charles Severance's Python for Informatics

 

IN and NOT IN

if "H" in "Hello":
print("Yes")

"Z" not in "HEllo"

 

Identify the working directory

import os

os.getcwd()

Change the working directory (On my computer, I need double \ ).

os.chdir('c:\\temp')

 

Read a file and print a line that includes a search word (p. 129 of Python for Informatics)

import os
import re

os.chdir('C:\\temp')
hand=open('macro1.txt')
for line in hand:
line=line.rstrip()
if re.search('Madison',line):
print (line)