file.py 文件源码

def fuzzy_hash(self):
            if not hasattr(self, '_fuzzy_hash'):
                # tlsh is not meaningful with files smaller than 512 bytes
                if os.stat(self.path).st_size >= 512:
                    h = tlsh.Tlsh()
                    with open(self.path, 'rb') as f:
                        for buf in iter(lambda: f.read(32768), b''):
                            h.update(buf)
                    h.final()
                    try:
                        self._fuzzy_hash = h.hexdigest()
                    except ValueError:
                        # File must contain a certain amount of randomness.
                        self._fuzzy_hash = None
                else:
                    self._fuzzy_hash = None
            return self._fuzzy_hash