I just had emergency gallbladder removal surgery three days ago and the only dietary advice I was given upon discharge was to avoid foods that are high in fat until I'm feeling better. I was told that otherwise I might have diarrhea, which made me laugh for obvious reasons. They said every patient's different and you'll learn by trial and error if there are foods you should now avoid.
Something I was unprepared for was how difficult it was to have bowel movements for the first 1.5 to 2 days. It's getting easier now but is still unpleasant. Part of this is that I was on intravenous antibiotics, followed by oral antibiotics. Those meds completely eliminate gas for me, and without gas it's hard to empty my pouch. Part of it's the abdominal pain every time I tried to push. The pain's particularly bad in the area where they cut through old scar tissue.