程序异常如何返回错误信息.ipynb

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   "source": [
    "# 原来写C的人来传递函数调用失败的信息是用null来判断，这是因为win32的API里面是这么传递的"
   ]
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    "# 当然现在为了定位问题肯定不会这么简单了，而且null会影响系统安全性，如果忘记了对返回值校验，后面就慢慢去debug吧"
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
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   "source": [
    "# 现在都是改成返回一个对象，能够返回错误信息和数据"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
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   "source": [
    "# 还可以抛出异常，不过当我们对异常什么都做不了的时候，就别抛出异常了\n",
    "# 因为抛出来异常别人捕获了做不了什么，就还是算了吧，现在调用方一般最少都会打印日志，所以异常一般都抛\n",
    "# 如果只是一些什么缓存逻辑查询这些，就别抛出异常了"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
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   "source": [
    "# Python打印日志信息有专门的logging，我还和智障一样非要自己写一个"
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 可以用raise或者assert来触发异常"
   ]
  },
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   "execution_count": null,
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   "outputs": [],
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