why output like this [4, 6, 8, 9]

Question

f=open("num.txt","w")
f.write("1\n2\n3\n4\n5\n6\n7\n8\n9\n10")
f.close()
f=open("num.txt","r")
m=0
r=f.read()
l=r.split("\n")
leng=len(l)
p=[]
c=[]
def prime(num):
flag = False
if num > 1:
for i in range(2, num):
if (num % i) == 0:
flag = True
if flag and num>1:
c.append(num)
if not flag and num>1:
p.append(num)
while m<leng:
num=int((l)[m])
prime(m)
m=m+1
print("Numbers:\n",r)
print("Prime numbers: ",p)
print("Composite Numbers: ",c)

why output(composite number) has no first number and last number?(1 and 10)

Answer 1

1 ist not > 1 . so no condition matches
please try else-statement instead of if not
or try
not(flag and num > 1)

10 is not < leng and will not be regarded
while m <= leng
will do it.