Initial commit - session 1 - errors and exceptions

4c15a5a7 · Renato Alves · 4c15a5a7 · 4c15a5a7 · 4c15a5a7
Verified Commit 4c15a5a7 authored 5 years ago by Renato Alves
--- a/session_1_errors_and_exceptions/Python_errors_exceptions.ipynb
+++ b/session_1_errors_and_exceptions/Python_errors_exceptions.ipynb
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "See more at: https://tobyhodges.github.io/python-embl-jan-2020/19-errors/index.html"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:19:10.716545Z",
+     "start_time": "2020-02-18T14:19:10.659110Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "def favorite_ice_cream():\n",
+    "    ice_creams = [\n",
+    "        \"chocolate\",\n",
+    "        \"vanilla\",\n",
+    "        \"strawberry\"\n",
+    "    ]\n",
+    "    print(ice_creams[3])\n",
+    "\n",
+    "favorite_ice_cream()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:27:33.171590Z",
+     "start_time": "2020-02-18T14:27:33.155200Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "def increment(i=0):\n",
+    "    if i > 3:\n",
+    "        oops\n",
+    "    else:\n",
+    "        increment(i + 1)\n",
+    "\n",
+    "increment()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Syntax errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:19:58.500294Z",
+     "start_time": "2020-02-18T14:19:58.497334Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "def some_function()\n",
+    "    msg = \"hello, world!\"\n",
+    "    print(msg)\n",
+    "     return msg"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:20:18.712147Z",
+     "start_time": "2020-02-18T14:20:18.708431Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "def some_function():\n",
+    "    msg = \"hello, world!\"\n",
+    "    print(msg)\n",
+    "     return msg"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:20:45.577106Z",
+     "start_time": "2020-02-18T14:20:45.574143Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "def some_function():\n",
+    "\tmsg = \"hello, world!\"\n",
+    "\tprint(msg)\n",
+    "    return msg"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Variable name errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:21:04.209385Z",
+     "start_time": "2020-02-18T14:21:04.203133Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "print(a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:21:15.987901Z",
+     "start_time": "2020-02-18T14:21:15.981140Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "print(hello)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for number in range(10):\n",
+    "    count = count + number\n",
+    "print(\"The count is:\", count)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "Count = 0\n",
+    "for number in range(10):\n",
+    "    count = count + number\n",
+    "print(\"The count is:\", count)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Index errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "letters = ['a', 'b', 'c']\n",
+    "print(\"Letter #1 is\", letters[0])\n",
+    "print(\"Letter #2 is\", letters[1])\n",
+    "print(\"Letter #3 is\", letters[2])\n",
+    "print(\"Letter #4 is\", letters[3])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# File errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "file_handle = open('myfile.txt', 'r')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:28:45.660292Z",
+     "start_time": "2020-02-18T14:28:45.653915Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "file_handle = open('myotherfile.txt', 'w')\n",
+    "file_handle.read()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:34:41.277740Z",
+     "start_time": "2020-02-18T14:34:41.274630Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "import os\n",
+    "print(\"File myunreadable.txt exists:\", os.path.isfile(\"myunreadable.txt\"))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:34:44.266647Z",
+     "start_time": "2020-02-18T14:34:44.259800Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "file_handle = open('myunreadable.txt', 'r')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Type errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:36:37.424936Z",
+     "start_time": "2020-02-18T14:36:37.418264Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "num = 1\n",
+    "text = '2'\n",
+    "num + text"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:36:42.947023Z",
+     "start_time": "2020-02-18T14:36:42.943004Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "num + num"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:36:48.686545Z",
+     "start_time": "2020-02-18T14:36:48.683006Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "text + text"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:36:54.611110Z",
+     "start_time": "2020-02-18T14:36:54.607394Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "num - num"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:37:02.851156Z",
+     "start_time": "2020-02-18T14:37:02.845192Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "text - text"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:37:13.212982Z",
+     "start_time": "2020-02-18T14:37:13.209445Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "num * num"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:37:18.986510Z",
+     "start_time": "2020-02-18T14:37:18.980489Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "text * text"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Numeric errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:43:07.481313Z",
+     "start_time": "2020-02-18T14:43:07.473479Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "1 / 0"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Resource errors"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-02-18T14:45:01.440238Z",
+     "start_time": "2020-02-18T14:45:01.432890Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "list(range(10000000000000))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Exception hierarchy\n",
+    "\n",
+    "https://docs.python.org/3/library/exceptions.html#exception-hierarchy\n",
+    "\n",
+    "# Exceptions built into python\n",
+    "\n",
+    "https://docs.python.org/3/library/exceptions.html#base-classes"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
+%% Cell type:markdown id: tags:
+
+See more at: https://tobyhodges.github.io/python-embl-jan-2020/19-errors/index.html
+
+%% Cell type:code id: tags:
+
+``` python
+def favorite_ice_cream():
+    ice_creams = [
+        "chocolate",
+        "vanilla",
+        "strawberry"
+    ]
+    print(ice_creams[3])
+
+favorite_ice_cream()
+```
+
+%% Cell type:code id: tags:
+
+``` python
+def increment(i=0):
+    if i > 3:
+        oops
+    else:
+        increment(i + 1)
+
+increment()
+```
+
+%% Cell type:markdown id: tags:
+
+# Syntax errors
+
+%% Cell type:code id: tags:
+
+``` python
+def some_function()
+    msg = "hello, world!"
+    print(msg)
+     return msg
+```
+
+%% Cell type:code id: tags:
+
+``` python
+def some_function():
+    msg = "hello, world!"
+    print(msg)
+     return msg
+```
+
+%% Cell type:code id: tags:
+
+``` python
+def some_function():
+	msg = "hello, world!"
+	print(msg)
+    return msg
+```
+
+%% Cell type:markdown id: tags:
+
+# Variable name errors
+
+%% Cell type:code id: tags:
+
+``` python
+print(a)
+```
+
+%% Cell type:code id: tags:
+
+``` python
+print(hello)
+```
+
+%% Cell type:code id: tags:
+
+``` python
+for number in range(10):
+    count = count + number
+print("The count is:", count)
+```
+
+%% Cell type:code id: tags:
+
+``` python
+Count = 0
+for number in range(10):
+    count = count + number
+print("The count is:", count)
+```
+
+%% Cell type:markdown id: tags:
+
+# Index errors
+
+%% Cell type:code id: tags:
+
+``` python
+letters = ['a', 'b', 'c']
+print("Letter #1 is", letters[0])
+print("Letter #2 is", letters[1])
+print("Letter #3 is", letters[2])
+print("Letter #4 is", letters[3])
+```
+
+%% Cell type:markdown id: tags:
+
+# File errors
+
+%% Cell type:code id: tags:
+
+``` python
+file_handle = open('myfile.txt', 'r')
+```
+
+%% Cell type:code id: tags:
+
+``` python
+file_handle = open('myotherfile.txt', 'w')
+file_handle.read()
+```
+
+%% Cell type:code id: tags:
+
+``` python
+import os
+print("File myunreadable.txt exists:", os.path.isfile("myunreadable.txt"))
+```
+
+%% Cell type:code id: tags:
+
+``` python
+file_handle = open('myunreadable.txt', 'r')
+```
+
+%% Cell type:markdown id: tags:
+
+# Type errors
+
+%% Cell type:code id: tags:
+
+``` python
+num = 1
+text = '2'
+num + text
+```
+
+%% Cell type:code id: tags:
+
+``` python
+num + num
+```
+
+%% Cell type:code id: tags:
+
+``` python
+text + text
+```
+
+%% Cell type:code id: tags:
+
+``` python
+num - num
+```
+
+%% Cell type:code id: tags:
+
+``` python
+text - text
+```
+
+%% Cell type:code id: tags:
+
+``` python
+num * num
+```
+
+%% Cell type:code id: tags:
+
+``` python
+text * text
+```
+
+%% Cell type:markdown id: tags:
+
+# Numeric errors
+
+%% Cell type:code id: tags:
+
+``` python
+1 / 0
+```
+
+%% Cell type:markdown id: tags:
+
+# Resource errors
+
+%% Cell type:code id: tags:
+
+``` python
+list(range(10000000000000))
+```
+
+%% Cell type:markdown id: tags:
+
+# Exception hierarchy
+
+https://docs.python.org/3/library/exceptions.html#exception-hierarchy
+
+# Exceptions built into python
+
+https://docs.python.org/3/library/exceptions.html#base-classes
--- a/session_1_errors_and_exceptions/myotherfile.txt
+++ b/session_1_errors_and_exceptions/myotherfile.txt
--- a/session_1_errors_and_exceptions/myunreadable.txt
+++ b/session_1_errors_and_exceptions/myunreadable.txt