code: def acts(self):
          
          if self.acls is None:
              return None
          return {p: acl * self.get_thin_interval()
                  for (p, acl) in self.acls.items()}
docs: The autocorrelation times of each parameter.
  
          The autocorrelation time is defined as the ACL times the
          ``thin_interval``. It gives the number of iterations between
          independent samples.