import os

def main():
    print 'Hello World!'
    
    print "This is Alice's greeting."
    print 'This is Bob\'s greeting.'
    
    foo(5,10)
    
    print '=' *10
    print 'Current working directory is' + os.getcwd()
    
    counter = 0
    counter += 1
    
    food = ['apple', 'orange', 'cat']
    
    for i in food:
        print 'I like to eat ' + i
    
    print 'Count to ten:'
    for i in range(10)
        print i


def foo(param1, secondParam):
    res =  param1 + secondParam
    
    print '%s plus %s equal to %s' % (param1, secondParam, res)
    
    if res < 50:
        print 'foo'
        
    elif (res >=  50) and ((param1 == 42 ) or (secondParam == 24)):
        print 'bar'
    
    else:
        print 'moo'
        
    return res #This is a one-line comment.
    '''A multi-
line string, but also be a multi-line comment.'''

if _name_ ==  "_main_":
    main()

Update main.py