python中带[]的for循环做什么？[]包含.csv文件

Question

我是python新手，有人能给我解释一下这段代码吗？你知道吗

TRAIN_CSV = './train1.csv' # this comtains 100 entries
TEST_CSV = './test1.csv' # this contains 50 entries
train_df = pd.read_csv(TRAIN_CSV)
test_df = pd.read_csv(TEST_CSV)

for dataset in [train_df, test_df]:   # what does this mean here
     do something

Answer 1

在本例中，括号表示列表。因此，您将遍历仅由两个元素train_df和test_df定义的列表。你知道吗