Why am I getting a string out of range error?

Question

l1 = []
for i in range(2, 300000):
x = str(i)
for j in range(len(x)):
if sum(list(map(lambda m : int(m[j])**5, x))) == i:
l1.append(i)

print(l1)

I dont see why I'm getting a string out of range error in this code. Sorry for the copy paste but I don't know how to add a code in a message.

Answer 1

Hmm... you use m as an argument in lambda. So what is m[j] supposed to mean?

Answer 2

I use the lambda function on x, so m[j] is the 'value' of the string at index j. It's really strange because this loop works for i in range(10), but when i gets bigger than 10 it will give an error. when I use j in range(len(x)-1) it will work for i in range(10, 100). When I use j in range(len(x)-2) it will work for i in range(100, 1000) and so on. I really don't see why that happens.