def get_signal_groups(input_path):
file = os.listdir(input_path)[0]
mdf_file = MDF(os.path.join(input_path, file))
info = mdf_file.info()
group_count = info['groups']
groups = []
for i in range(0, group_count):
group = info['group %d' % i]
groups.append(group['comment'])
return groups
