 ```python
from pyscf import gto, scf, mp, dft

# Define the cell
a = np.eye(3)*3.3
cell = gto.Cell()
cell.atom = '''H 0 0 0; H 0 0 1.1; H 0 1.1 0; H 0 1.1 1.1;
                H 1.1 0 0; H 1.1 0 1.1; H 1.1 1.1 0; H 1.1 1.1 1.1'''
cell.basis = 'gth-szv'
cell.pseudo = 'gth-pade'
cell.a = a
cell.unit = 'B'
cell.build()

# KHF and KMP2 calculations with 2x2x2 k-points
kpts = (2,2,2)
khf = scf.KRHF(cell, kpts=kpts)
khf.kernel()
kmps2 = mp.KMP2(khf)
kmps2.kernel()
print('KMP2 energy per unit cell with 2x2x2 k-points:', kmps2.e_tot)

khf = scf.KRHF(cell, kpts=(1,1,1))
khf.kernel()
kmps2 = mp.KMP2(khf)
kmps2.kernel()
print('KMP2 energy per unit cell with single k-point:', kmps2.e_tot)

# RHF calculation with single k-point
rhf = scf.RHF(cell, kpts=(1,1,1))
rhf.kernel()
rmp2 = mp.RMP2(rhf)
rmp2.kernel()
print('RMP2 energy per unit cell with single k-point:', rmp2.e_tot)

dms = rmp2.make_rdm12()
print('Total energy based on RHF MP2 density matrices:', rmp2.energy_tot(dms))

# Convert RHF object to UHF and GHF objects
uhf = rhf.uhf()
ghf = rhf.ghf()

# UMP2 and GMP2 calculations
umphf = mp.UMP2(uhf)
umphf.kernel()
print('UMP2 energy per unit cell with single k-point:', umphf.e_tot)

ump2 = mp.GMP2(ghf)
ump2.kernel()
print('GMP2 energy per unit cell with single k-point:', ump2.e_tot)

dms = ump2.make_rdm12()
print('Total energy based on GHF MP2 density matrices:', ump2.energy_tot(dms))
```
Please note that the provided code uses the `numpy` library, which is imported as `np`. If you don't have it installed, you can install it using pip:

```bash
pip install numpy
```