Realization method of finding the sum and average value of an array with python

As shown below:

# coding = GBK

a =[1,2,3,4,5]

sum=0

b = len(a)

print(" The length of this array is: ",b)

for i in a:

 sum =sum +i

print(" The sum of these arrays is: ",sum)

print(" The average number of this array is ",sum/b)