Bit Stuffing - Computer Networks | Python3

a=int(input("enter string of 1's and 0's: "))
l=len(str(a))
print ('Length of bit: ',l)
a=int(a)
list1=[]
for i in range (0,l,1):
    list1.append(a%10)
    a=a//10
list1.reverse()
count=0
x=0
for i in range (0,l,1):
    if(list1[i]==1):
        count+=1
    else:
        count=0
    if(count==5):
        list1.insert(i+1,0)
        i=i+1
        x=x+1

str1 = ''.join(str(list1))
print ("At sender side:",str1)

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