Errors

Author: sarincr

Diff for: 11.Custom Exceptions.ipynb

@@ -319,6 +319,114 @@
     "    print(\"caught an exception)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "OS error: [Errno 2] No such file or directory: 'myfile.txt'\n"
+     ]
+    }
+   ],
+   "source": [
+    "import sys\n",
+    "\n",
+    "try:\n",
+    "    f = open('myfile.txt')\n",
+    "    s = f.readline()\n",
+    "    i = int(s.strip())\n",
+    "except OSError as err:\n",
+    "    print(\"OS error: {0}\".format(err))\n",
+    "except ValueError:\n",
+    "    print(\"Could not convert data to an integer.\")\n",
+    "except:\n",
+    "    print(\"Unexpected error:\", sys.exc_info()[0])\n",
+    "    raise"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Could not convert data to an integer.\n"
+     ]
+    }
+   ],
+   "source": [
+    "import sys\n",
+    "\n",
+    "try:\n",
+    "    f = open('file.txt')\n",
+    "    s = f.readline()\n",
+    "    i = int(s.strip())\n",
+    "except OSError as err:\n",
+    "    print(\"OS error: {0}\".format(err))\n",
+    "except ValueError:\n",
+    "    print(\"Could not convert data to an integer.\")\n",
+    "except:\n",
+    "    print(\"Unexpected error:\", sys.exc_info()[0])\n",
+    "    raise"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 27,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "cannot open -f\n",
+      "/run/user/1000/jupyter/kernel-0150ccef-642d-4c64-83c7-bb242793ea41.json has 12 lines\n"
+     ]
+    }
+   ],
+   "source": [
+    "for arg in sys.argv[1:]:\n",
+    "    try:\n",
+    "        f = open(arg, 'r')\n",
+    "    except OSError:\n",
+    "        print('cannot open', arg)\n",
+    "    else:\n",
+    "        print(arg, 'has', len(f.readlines()), 'lines')\n",
+    "        f.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 28,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "('E', 'r', 'r', 'o', 'r')\n"
+     ]
+    }
+   ],
+   "source": [
+    "class Networkerror(RuntimeError): \n",
+    "    def __init__(self, arg): \n",
+    "        self.args = arg \n",
+    "  \n",
+    "try: \n",
+    "    raise Networkerror(\"Error\") \n",
+    "  \n",
+    "except Networkerror as e: \n",
+    "    print (e.args) "
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,