Xz Backdoor, Cybersecurity.
Exception(f"isExist: char value err, char = {char}") if char < 0x40: return (self.louint64 >> char) &amp; 1 == 1 else: char -= 0x40 return (self.hiuint64 >> char) &amp; 1 == 1 def getChild(self, char: int): if char >= 0x40: char -= 0x40 return self.childPtr[char] class RadixTree: def