2s complement NOT operator python 3.9 can't print inverse binary

Question

I'm trying to print the NOTed binary of a number using ~ e.g.

x = 0b11110000
c = ~x
print(bin(x))
print(bin(c))
print(bin(0b0001111))

I get

0b11110000
-0b11110001
0b1111

How do I get c to print as 0b1111 instead of its negative representation?