Cline 项目规则教程：CSV 空字段、中文逗号与规则检查

--- a/app.py
+++ b/app.py
@@ -1,2 +1,5 @@
+import csv
+import io
+
 def parse_csv(text):
-    return [line.split(',') for line in text.strip().splitlines()]
+    return list(csv.reader(io.StringIO(text)))

before exit=1\ntest_contract (test_app.LessonTest.test_contract) ... FAIL

======================================================================
FAIL: test_contract (test_app.LessonTest.test_contract)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/lorin/my-clone/quickrout/public/downloads/tutorials-batch50b-20261014/practical/cline-csv-empty-field-rules/before/test_app.py", line 6, in test_contract
    self.assertEqual(parse_csv('id,name,note\n1,"杯,白",\n')[1], ['1','杯,白',''])
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Lists differ: ['1', '"杯', '白"', ''] != ['1', '杯,白', '']

First differing element 1:
'"杯'
'杯,白'

First list contains 1 additional elements.
First extra element 3:
''

- ['1', '"杯', '白"', '']
?        -   ------

+ ['1', '杯,白', '']
?         ++


----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (failures=1)
\nfixed exit=0\ntest_contract (test_app.LessonTest.test_contract) ... ok

----------------------------------------------------------------------
Ran 1 test in 0.000s

OK

标准库测试真实运行；参考代码人工编写，未执行 Cline 或付费模型。