--- FAIL: TestEmployeeData (8.98s) panic: runtime error: invalid memory address or nil pointer dereference [recovered] panic: runtime error: invalid memory address or nil pointer dereference [signal 0xc0000005 code=0x0 addr=0x0 pc=0x123c20b]
时间: 2024-04-24 17:22:51 浏览: 115
这看起来像是一个运行时错误,它表明您的代码尝试访问一个无效的内存地址或一个空指针引用。这种类型的错误通常发生在您尝试访问未初始化或已被释放的内存地址时。建议您仔细检查代码,并确保所有变量和指针都已正确初始化,并且没有任何错误的空指针引用。另外,您可以考虑使用调试工具来检查您的代码,以便更好地了解错误发生的原因。
相关问题
goods_list = { "book" : [ {"name" : "python","price" : 8.98,"kc" :10}, {"name" : "mysql","price" : 13,"kc" :20} ], "houseietm" :[ {"name" : "桌子","price" : 13,"kc" :20}, {"name": "床", "price": 13, "kc": 20} ] } print(goods_list.keys()) for i in goods_list : goods_list[i] for itme in goods_list[i] print(i) print(itme["name"]) 优化代码
你可以通过遍历字典的方式来实现代码的优化。以下是优化后的代码示例:
```python
goods_list = {
"book" : [
{"name" : "python","price" : 8.98,"kc" :10},
{"name" : "mysql","price" : 13,"kc" :20}
],
"houseietm" :[
{"name" : "桌子","price" : 13,"kc" :20},
{"name": "床", "price": 13, "kc": 20}
]
}
for category, items in goods_list.items():
for item in items:
print(category)
print(item["name"])
```
在优化后的代码中,我们使用了`items()`方法来同时遍历字典的键和值。然后,使用嵌套的循环遍历每个类别的商品,并打印出类别和商品的名称。这样,代码更加简洁和可读。
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