This is a script which performs several vector functions

vectors.py

 # this function adds two vectors together to produce a new vector, vector3.
 # first vector 3 is defined as an array. then, an if sentence tests
 #which vector is longer. this means that vectors of unequal sizes can be added
 # together. - except that this doesn't actually work... loop stops 
 # the for loop adds each element of the first vector to that of its counterpart
 # the output is then appended to vector3, the new output.
def vectorAdd(vector1,vector2):
	vector3 = []
	if len(vector1)<= len(vector2):
		vectorSize = len(vector1)
	else: vectorSize = len(vector2)
	for i in range (vectorSize):
		vector3.append(vector1[i] + vector2[i])
	print vector3


# this function returns the DotProduct of two Vectors
# the lengthbased looping is retained from vector addition,
# but the result is now created by incrementing the product variable
# with the product of each row multiplication.
def DotProduct(vector1,vector2):
	product = 0
	if len(vector1) >= len(vector2):
		vectorSize = len(vector1)
	else: vectorSize = len(vector2)
	for i in range(vectorSize):
		product+= (vector1[i] * vector2[i])
	print product

# this function is used to create vectors
def createVector(newVector):
    length = int(raw_input('Enter the number of variables in your vector: '))
    for i in range(length):
        i +=1
        newVector.append(int(raw_input('Enter variable %s: ' %i)))
    print newVector