修改前后 diff
--- a/app.py
+++ b/app.py
@@ -1,2 +1,4 @@
+from decimal import Decimal
+
def add_money(a, b):
- return float(a) + float(b)
+ return (Decimal(a) + Decimal(b)).quantize(Decimal('0.01'))
真实测试记录
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/continue-project-rule-money/before/test_app.py", line 6, in test_contract
self.assertEqual(str(add_money('0.10','0.20')), '0.30')
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: '0.30000000000000004' != '0.30'
- 0.30000000000000004
+ 0.30
----------------------------------------------------------------------
Ran 1 test in 0.000s
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 Continue 或付费模型。