def f(x):
    'my first function'
    return 2*x**3+1

def avg(x,y):
    'return average of x and y'
    return (x+y)/2

def isSorted(lst):
    'return T'
    for i in range(len(lst)-1):
        if lst[i] > lst[i+1]:
            return False
    return True

def copy(fromFile, toFile):
    infile = open(fromFile, 'r')
    content = infile.read()
    infile.close()
    outfile = open(toFile, 'w')
    outfile.write(content)
    outfile.close()