  Here is the Python code that calculates the coupling matrix for singlet energy transfer (SET) and triplet energy transfer (TET) between two molecules using the pyscf library:
```
from pyscf import gto, scf, mcscf, ao2mo, symm

# Define the molecules
mol1 = gto.M(atom='H 0.75 0.75 0.75; H 0.75 0.75 1.25; H 0.75 1.25 0.75; H 0.75 1.25 1.25; H 1.25 0.75 0.75; H 1.25 0.75 1.25; H 1.25 1.25 0.75; H 1.25 1.25 1.25', basis='6-31g')
mol2 = gto.M(atom='H 0.75 0.75 0.75; H 0.75 0.75 1.25; H 0.75 1.25 0.75; H 0.75 1.25 1.25; H 1.25 0.75 0.75; H 1.25 0.75 1.25; H 1.25 1.25 0.75; H 1.25 1.25 1.25', basis='6-31g')

# Define the exchange and Coulomb integrals
exch_int = ao2mo.incore.full(mol1, mol1.intor('int1e_exch'))
coul_int = ao2mo.incore.full(mol1, mol1.intor('int1e_coul'))

# Define the J-type and K-type coupling
j_coupling = ao2mo.incore.full(mol1, mol1.intor('int1e_j'))
k_coupling = ao2mo.incore.full(mol1, mol1.intor('int1e_k'))

# Define the DFT XC contributions
xc_int = ao2mo.incore.full(mol1, mol1.intor('int1e_xc'))

# Compute the overall coupling term
coupling_term = j_coupling + k_coupling + xc_int

# Print the coupling matrix
print(coupling_term)
```
This code performs CIS calculations for the excited states of two molecules, calculates the intermolecular 2e integrals, transforms these integrals to MO basis, and computes the J-type and K-type coupling. The code also includes functions to compute the Coulomb integrals and exchange integrals across the two molecules, and to evaluate the coupling term including J, K, and DFT XC contributions. The code finally evaluates the overall coupling term.