Ostap: improve getitem/setitem for 2D and 3D histograms, improve a bit histogram parameterization
Ostap: improve getitem/setitem for 2D and 3D histograms, improve a bit histogram parameterization
h2[ix][iy] = value
v = h2[ix][iy]
h2[ix,iy] = value
v = h2[ix,iy]
h3[ix][iy][iz] = value
v = h3[ix][iy][iz]
h3[ix][iy,iz] = value
v = h3[ix][iy,iz]
h3[ix,iy][iz] = value
v = h3[ix,iy][iz]
h3[ix,iy,iz] = value
v = h3[ix,iy,iz]