python - python中同时循环两个for循环的问题

Question

我想在python中同时执行两个for循环，以便同时读取两个不同文件中具有相同索引的两行。

这是我尝试过的:

def load_dataset(train_path: str, label_path: str) -> Tuple[List[str], List[str]]:
   words = []
   labels = []
   with open(train_path, encoding='utf8') as tp, open(label_path, encoding='utf8') as lp:
       for line_tp in tp, line_lp in lp:
           line_tp = line_tp.strip()
           line_lp = line_lp.strip()
           if line_tp and line_lp:
               word = line_tp
               label = line_lp 
               words.append(word)
               labels.append(label)
   return words, labels

但是，当我尝试调用该函数时

(train_list, label_list) = load_dataset(train_path, label_path)

我得到:

UnboundLocalError: local variable 'line_lp' referenced before assignment

现在，我真的认为问题是第一个 for 循环在第二个循环之前执行，有没有办法同时执行它们，使用相同的索引？

Answer 1

如果你想在一个循环中迭代到迭代器，你应该使用 zip()

for line_tp, line_lp in zip(tp, lp):