class_docstr: Raised if the chain is too short to estimate an autocorrelation time.
  
  The current estimate of the autocorrelation time can be accessed via the
  ``tau`` attribute of this exception.
code: def __init__(self, tau, *args, **kwargs):
      self.tau = tau
      super(AutocorrError, self).__init__(*args, **kwargs)
  
file_path: emcee/src/emcee/autocorr.py
imports: import logging
  import numpy
label_desc: Use image node_id 1 to create a new AutocorrError object from inherited base classes: Exception with example: obj = AutocorrError(tau)