python string as hex terminated with null

I receive strings in their hex开发者_JS百科 format, i.e. s = "0x0ff" or s = "0fd" how can I check whether the above type of strings are null terminated or not? thanks!

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Try

s[-2:] == "00"

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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.