python string as hex terminated with null

Question

I receive strings in their hex format, ie s = "0x0ff" or s = "0fd" how can I check whether the above type of strings are null terminated or not? thanks!

Answer 1

尝试

s[-2:] == "00"

Answer 2

Why would you care wether python strings are null terminated?

If you want to check wether the strings start by "0x" you can just use

x.startswith("0x")

as x cannot be located anywhere else in a hexstring.