python查找相邻两行为分别包含固定单词

#!/bin/python                                                                                                                                                  line_count = 0 file1=open("1")line_list=file1.readlines()for line in line_list:        line_count=line_count+1    tmp = line.split(' ')      if len(tmp) < 4:        continue    if tmp[3] == "pool":            line2=line_list[line_count]        tmp2 = line2.split(' ')        if len(tmp2) < 4:            continue        if tmp2[3] != "destination":            print line_count    elif tmp[3] == "destination":        line2=line_list[line_count - 2]        tmp2 = line2.split(' ')        if len(tmp2) < 4:            continue        if tmp2[3] != "pool":            print line_countprint "finished"