tf.contrib.distributions.InverseGammaWithSoftplusAlphaBeta.variance()

tf.contrib.distributions.InverseGammaWithSoftplusAlphaBeta.variance(name='variance')

Variance.

Additional documentation from InverseGamma:

Variance for inverse gamma is defined only for alpha > 2. If self.allow_nan_stats is False, an exception will be raised rather than returning NaN.