my method is both gravity bleed, then press [not PUMP] pedal with a hose attached to the bleeder and immersed into a bottle of fluid.
using the wood block zip-tied on the pedal as RR suggested.
the reason i PRESS instead of PUMP is that i have found pumping a bunch has a tendency to aerate the fluid.

i have also used the one way valve a guy can get at most parts stores immersed in a jar of fluid with the hose attached to the bleeder.