import os

os.chdir('/Users/jeanmarkgawron/python/intro/intro_lecture_files/')
print os.getcwd()
file_handle = open('hello.txt','r')
l1 = file_handle.readline()  # Method syntax!
l2 = file_handle.readline()
l3 = file_handle.readline()
file_handle.close()

l1_list = l1.split()

file_handle2 = open('hello.txt','r')
lines = file_handle2.readlines() # Read the entire file into a string.
file_handle2.close()

file_handle3 = open('hello.txt','w')
for line in lines:
    line = line.strip() # remove carriage returns.
    print >> file_handle3, line[:-1] +'!'

file_handle3.close()