使用递归通过自己的命令在循环中创建循环

Question

我在递归方面遇到了一些困难。 我有一个 .txt 文件，其中包含这样的命令（<是注释）：

< HEADER 1
< HEADER 2
DO STH HERE
LOOP lblA 2
DO STH 
DO STH ELSE
END  lblA
DO STH HERE

如果有“LOOP lbl x”命令，则该工具必须重复该行和“END lbl”之间的每个命令 x 次。在通过 TCP 将每一行发送到服务器之前，输出会被临时保存：

< HEADER 1
< HEADER 2
DO STH HERE
< LOOP lblA 1 of 2
DO STH
DO STH ELSE
< LOOP lblA 2 of 2
DO STH
DO STH ELSE
< END LOOP lblA
DO STH HERE

这很简单。但现在我想要循环中的循环，例如

< HEADER 1
< HEADER 2
DO STH HERE
LOOP lblA 2
DO STH
LOOP lblB 3
print("nope")
END lblB 3
DO STH ELSE
END  lblA
DO STH HERE

输出必须是

< HEADER 1
< HEADER 2
DO STH HERE
< LOOP lblA 1 of 2
DO STH
< LOOP lblB 1 of 3
print("nope")
< LOOP lblB 2 of 3
print("nope")
< LOOP lblB 3 of 3
print("nope")
< END LOOP lblB
DO STH ELSE
< LOOP lblA 2 of 2
DO STH
< LOOP lblB 1 of 3
print("nope")
< LOOP lblB 2 of 3
print("nope")
< LOOP lblB 3 of 3
print("nope")
< END LOOP lblB
DO STH ELSE
< END LOOP lblA
DO STH HERE

这是我到目前为止的代码：

def comTester(self, testfile):
    rawtext = Path(testfile).read_text()
    txt = rawtext.split('\n')
    for i in range (0, len(txt), 1):
       loopArray = []
       loopLineA = 0
       loopLineB = 0
       loopLbl = ''
       loops = 0
       j = 0
       k = 1
       if txt[i].startswith('<') == True:
          testcommands.append(txt[i])
       elif txt[i].startswith('LOOP') == True:
          loopArray = txt[i].split(' ')
          loopLineA = i + 1
          loopLbl = loopArray[1]
          loops = int(loopArray[2])
          for j in range (loopLineA, len(txt), 1):
             if txt[j].startswith('END ' + loopLbl) == True:
                loopLineB = j
          while k < loops:
             l = 0
             testcommands.append('< LOOP "' + loopLbl + str(k) + ' of ' + str(loops))
             for l in range(loopLineA, loopLineB, 1):
                testcommands.append(txt[l])
             k = k + 1
          testcommands.append('# END LOOP ' + loopLbl)
       elif txt[i].startswith('END') == True:
          continue
       else:
          testcommands.append(txt[i])
return

我需要启动“elif txt[i].startswith('LOOP') == True:”块递归，但我不这样做知识。我必须创建一个新函数并调用它本身。但对于这个给定的结构......没有任何线索。