def file_exits_and_not_zombie(file_path):
"""Checks for existence of ROOT file and ensures it is not a zombie and has its keys"""
if os.path.isfile(file_path):
f = TFile(file_path)
if f.IsZombie() or f.GetSeekKeys() == 0:
f.Close()
return False
else:
f.Close()
return True
else:
return False
