  According to Harlow and Hayden [arXiv:1301.4504] the task of distilling
information out of Hawking radiation appears to be computationally hard despite
the fact that the quantum state of the black hole and its radiation is
relatively un-complex. We trace this computational difficulty to a geometric
obstruction in the Einstein-Rosen bridge connecting the black hole and its
radiation. Inspired by tensor network models, we conjecture a precise formula
relating the computational hardness of distilling information to geometric
properties of the wormhole - specifically to the exponential of the difference
in generalized entropies between the two non-minimal quantum extremal surfaces
that constitute the obstruction. Due to its shape, we call this obstruction the
"Python's Lunch", in analogy to the reptile's postprandial bulge.
