匹配精確的字符串並打印該行

Question

我想在第 3 次出現delimiter后檢查字符串是否與行中的子字符串匹配

mapping_name = reversed

delimiter = #

test_file.txt內容

1#ABC#test#reversed_once#gm#999
2#WBC#test_1#reversed_first#gm#9998
3#TBC#tested#reversed_last#gm#9998
4#CBC#test#reversed_reversed#gm#999
5#ZBC#test#reversed#gm#9990

我做了如下

wf_string = []
batch_file = open("/home/tester/test_file.txt", 'r')

for lines in batch_file:
    if mapping_name in lines:
        print(lines)
        wf_string.append(lines)

但它打印的是第4 and 5行4 and 5 。 理想情況下，它應該只打印第5th行

Answer 1

嘗試類似下面的操作（請注意，代碼假設您只想針對第四個字段進行匹配）

match = 'reversed'
with open('in.txt') as f:
  for idx,line in enumerate(f,1):
    if match == line.split('#')[3]:
      print(f'match in line {idx}')

輸出

match in line 5