list all the Armstrong numbers within a range

def armstr_checker(n):
    sum=0
    count = len(str(n))  #finding no of digits to be used as power
    num1 = n  #temp variable to store value of n
    while num1 > 0:
        last_digit = num1 % 10
        sum = sum + last_digit**count
        num1 = num1 // 10
    if sum == n:
        return True
    return False

try:
    num2 = int(input("enter an integer :"))
except ValueError:
    print("invalid input")

num2 = int(input("enter an integer :"))
list =[]
for i in range(num2):
    if armstr_checker(i) == True:
        list.append(i)
print(list)