In your case you can do something like:
a = "11111000 10011011 01101101 10011101 11100001 01111011 11000001 00010111"
a = a.replace(" ", "")
i = int(a, 2)
print(hex(i))
A one-liner would be:
print(hex(int("11111000 10011011 01101101 10011101 11100001 01111011 11000001 00010111".replace(" ", ""), 2)))