Upload solutions for gap_exercise1_basics

Exercises/solutions/gap_exercise1_basics.ipynb

+{
+ "nbformat": 4,
+ "nbformat_minor": 0,
+ "metadata": {
+  "colab": {
+   "name": "gaps_exercises1.ipynb",
+   "provenance": [],
+   "collapsed_sections": []
+  },
+  "kernelspec": {
+   "name": "python3",
+   "display_name": "Python 3"
+  },
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "# Python course - Exercises Gap text"
+   ],
+   "metadata": {
+    "id": "kH0p2uT-sQ6y",
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "Correct the Code"
+   ],
+   "metadata": {
+    "id": "uW9SoYEyrlRL",
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# What is missing here? Expected output: Hi!\n",
+    "print('Hi!')"
+   ],
+   "metadata": {
+    "id": "Qflb9AWfrykh",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 5,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hi!\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Here are two mistakes. Can you find them?\n",
+    "# Hi! I am a comment. How are you?\n",
+    "print('Hello world!')"
+   ],
+   "metadata": {
+    "id": "eemU0jTksxu5",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 6,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello world!\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Multi-line comments\n",
+    "\"\"\"\n",
+    "I want to be a\n",
+    "mutli line comment.\n",
+    "\"\"\" \n",
+    "print('Hello world!')"
+   ],
+   "metadata": {
+    "id": "2ysNg9wDtaZ9",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 7,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello world!\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Expected output: 5\n",
+    "c = 5\n",
+    "print(c)"
+   ],
+   "metadata": {
+    "id": "Vexbuvx1u1NS",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 8,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "5\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# How to print two strings as one. Expected output: Hello world\n",
+    "a = 'Hello '\n",
+    "b = 'world'\n",
+    "print( a + b )"
+   ],
+   "metadata": {
+    "id": "cGTJ95-9wzLT",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 9,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello world\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Variable types\n",
+    "# Does the error output help you?\n",
+    "a = 'Hello'\n",
+    "b = 0\n",
+    "print( a + str(b) )"
+   ],
+   "metadata": {
+    "id": "6QiU3l2_xFnP",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 10,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello0\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# What is missing?\n",
+    "a = 'Hello'\n",
+    "b = a\n",
+    "\n",
+    "if a == b:\n",
+    "    print('Same!')"
+   ],
+   "metadata": {
+    "id": "_YtGF9xqzFoR",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 11,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Same!\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Print the variable type\n",
+    "# Expected output: a is of type <class 'str'>\n",
+    "a = 'How are you?'\n",
+    "print('a is of type', type(a))"
+   ],
+   "metadata": {
+    "id": "wH0ifA4czyDV",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 12,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "a is of type <class 'str'>\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Variable names: What is allowed and what not?\n",
+    "_1th_string   = \"Hello\"\n",
+    "second_string = 'world'\n",
+    "third_string  = '!'\n",
+    "FOURTH_STRING = 'How'\n",
+    "FIFTH_STRING  = 'are'\n",
+    "_6th_string   = 'you?'\n",
+    "\n",
+    "print(_1th_string, second_string, \n",
+    "      third_string, FOURTH_STRING,\n",
+    "      FIFTH_STRING, _6th_string\n",
+    "      )"
+   ],
+   "metadata": {
+    "id": "Spcu5lGc0Uv9",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 13,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello world ! How are you?\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# convert b into float\n",
+    "a = 2\n",
+    "b = float(a)\n",
+    "print(b)"
+   ],
+   "metadata": {
+    "id": "_TcdURMh2yJZ",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 14,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2.0\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# How to access Lists?\n",
+    "my_list = [\"!\", \"Hello\", 'you', \"How\", '?', 1, 'are', 2, 3, \"world\"]\n",
+    "print(my_list)\n",
+    "print(my_list[ 0 ])     # print '!'\n",
+    "print(my_list[ 1 ])     # print 'Hello'\n",
+    "print(my_list[ -1 ])    # print the last element of a list without the real index; here 'world'\n",
+    "### print 'Hello world! How are you?':\n",
+    "print(my_list[ 1 ], my_list[ -1 ] ,my_list[0] ,my_list[ 3 ] ,my_list[ -4 ] ,my_list[ 2 ], my_list[4])"
+   ],
+   "metadata": {
+    "id": "5VripGXYxBf8",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 15,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['!', 'Hello', 'you', 'How', '?', 1, 'are', 2, 3, 'world']\n",
+      "!\n",
+      "Hello\n",
+      "world\n",
+      "Hello world ! How are you ?\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Indices of Strings\n",
+    "a = 'Hello world!'\n",
+    "print(a[ -1 ]) # only print !\n",
+    "print(a[ 0 ]) # only print H\n",
+    "print(a[ 6:-1 ]) # only print 'world', without '!'"
+   ],
+   "metadata": {
+    "id": "V3VJP2gg1HLT",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 16,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "!\n",
+      "H\n",
+      "world\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Dictionaries\n",
+    "my_dict = { 'chr1' : 'gene1', 'chr2' : 'gene3' }\n",
+    "print(my_dict[ 'chr1' ]) # print gene1 of the dictionary"
+   ],
+   "metadata": {
+    "id": "6e6KYBcQ0qa3",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 17,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "gene1\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Dictionaries2; Find the mistake\n",
+    "my_dict = { 'chr1' : 'gene1', 'chr2' : 'gene3' }\n",
+    "print(my_dict[ 'chr1' ]) # print gene1 of the dictionary"
+   ],
+   "metadata": {
+    "id": "44dxJxK2bR2n",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 18,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "gene1\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Dictionaries3\n",
+    "my_dict = { 'chr1' : ['gene1', 'gene2'], 'chr2' : 'gene3' }\n",
+    "print(my_dict[ 'chr1' ][ 1 ]) # print gene2 of the dictionary"
+   ],
+   "metadata": {
+    "id": "RdIWfnVsbpVF",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 19,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "gene2\n"
+     ]
+    }
+   ]
+  },
+  {
+   "cell_type": "code",
+   "source": [
+    "# Booleans\n",
+    "a = 0\n",
+    "b = 1\n",
+    "print(bool( b )) # print True; insert the right variable\n",
+    "print(bool( a )) # print False; insert the right variable"
+   ],
+   "metadata": {
+    "id": "PrmB8FZD0-PQ",
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   },
+   "execution_count": 20,
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n",
+      "False\n"
+     ]
+    }
+   ]
+  }
+ ]
+}
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