好的！你提供的图片中，**表 12.5 字典常用方法基础知识** 部分需要填写结果。下面我为你完整列出对应的 Python 代码 + 运行结果，方便你直接复制验证或填入表格。 --- ## ✅ 表 12.5 字典方法结果（含代码与输出） ```python # 定义字典 week1 = {1:'Mon', 2:'Tues', 3:'Wed', 4:'Thur', 5:'Fri', 6:'Sat', 7:'Sun'} print("原始字典 week1:", week1) print("-" * 50) # 1. week1.values() result_values = week1.values() print("week1.values() →", result_values) print("转换为列表:", list(result_values)) # 2. week1.items() result_items = week1.items() print("\nweek1.items() →", result_items) print("转换为列表:", list(result_items)) # 3. week1.keys() result_keys = week1.keys() print("\nweek1.keys() →", result_keys) print("转换为列表:", list(result_keys)) # 4. week1.get(2) result_get_2 = week1.get(2) print("\nweek1.get(2) →", result_get_2) # 5. week1[8] = week1.get(8, 'WW') # 注意：这行是赋值操作，不是查询！它会修改字典 week1[8] = week1.get(8, 'WW') # 因为键8不存在，所以返回默认值'WW'，并赋值给week1[8] print("\n执行 week1[8] = week1.get(8, 'WW') 后:") print("week1 现在变为:", week1) print("week1[8] 的值是:", week1[8]) ``` --- ## 🖨️ 运行结果预览（可直接填入表格“结果”列） | 字典方法 | 结果 | |------------------------------|----------------------------------------------------------------------| | `week1.values()` | `dict_values(['Mon', 'Tues', 'Wed', 'Thur', 'Fri', 'Sat', 'Sun'])` | | `week1.items()` | `dict_items([(1, 'Mon'), (2, 'Tues'), (3, 'Wed'), (4, 'Thur'), (5, 'Fri'), (6, 'Sat'), (7, 'Sun')])` | | `week1.keys()` | `dict_keys([1, 2, 3, 4, 5, 6, 7])` | | `week1.get(2)` | `'Tues'` | | `week1[8]=week1.get(8,'WW')` | **执行后字典新增键值对 `{8: 'WW'}`，原字典被修改** | > 💡 注意最后一行是一个**赋值语句**，不是单纯的方法调用。它的作用是： > - 如果键 `8` 存在，则取其值赋给 `week1[8]`（无变化） > - 如果键 `8` 不存在（如本例），则使用默认值 `'WW'` 赋给 `week1[8]` → **字典被修改** --- ## 📝 表格填写建议（简洁版） 如果你只需要填表，可以这样写： | 字典方法 | 结果 | |------------------------------|----------------------------------------------------------------------| | `week1.values()` | `dict_values(['Mon', 'Tues', 'Wed', 'Thur', 'Fri', 'Sat', 'Sun'])` | | `week1.items()` | `dict_items([(1, 'Mon'), (2, 'Tues'), ..., (7, 'Sun')])` | | `week1.keys()` | `dict_keys([1, 2, 3, 4, 5, 6, 7])` | | `week1.get(2)` | `'Tues'` | | `week1[8]=week1.get(8,'WW')` | 字典增加新项：`{8: 'WW'}` | --- ✅ 你可以把上面代码复制到 Python 环境运行，亲眼看到每一步的结果，完全符合题目要求“利用字典方法在表 12.5 中填写结果，并运行加以验证”。 如有其他表格或想扩展实验（比如尝试 `.pop()`, `.update()` 等），欢迎继续提问！