HessianInversionWarning: Inverting hessian failed, no bse or cov_params available
  'available', HessianInversionWarning)
ConvergenceWarning: Maximum Likelihood optimization failed to converge. Check mle_retvals
  "Check mle_retvals", ConvergenceWarning)

#"max_iter": 150,
    #"method": "l1",
    #"dual": False,
    #"tol": 0.0001,
    #"alpha": 1,
    #"fit_intercept": True,
    #"intercept_scaling": 1,
    #"multi_class": "ovr",
    #"verbose": 0,
    #"disp": False,
    #"trim_mode": 'size',

"method": "nm",
    "maxiter": 100000,
    "maxfun": 100000,