vec1 = vector_dict[text1]
 vec2 = vector_dict[text2]
 intersection = set(vec1.keys()) & set(vec2.keys())

 numerator = sum([vec1[x] * vec2[x] for x in intersection])
 sum1 = sum([vec1[x]**2 for x in vec1.keys()])
 sum2 = sum([vec2[x]**2 for x in vec2.keys()])
 denominator = math.sqrt(sum1) * math.sqrt(sum2)
 return round(float(numerator) / denominator, 2)