25/12 changes, daily practice

Author: atifiu

python_concepts/dictionary.ipynb

@@ -61,6 +61,39 @@
     "\n",
     "print(dict2.get('address', 'unknown'))"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "30\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "['a', 'b', 'c', 'd', 'e']"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# We can get the values using .values( method)\n",
+    "dict1 = {'a':2, 'b':4  , 'c':6, 'd':8 , 'e':10}\n",
+    "#get total values of the dictionary\n",
+    "total_value = sum(dict1.values())\n",
+    "print(total_value)\n",
+    "# convert dictionary keys into a list using keys() method\n",
+    "list(dict1.keys())"
+   ]
   }
  ],
  "metadata": {

python_daily_exercies/day1_25_12_2023.ipynb

@@ -0,0 +1,143 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['e', 'n', 't', 'r', 'p', 'u', 'i', 'a', 'l']\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Day 1 question from twitter https://twitter.com/CodingComputing/status/1738549517077614877\n",
+    "# It deals with concept of set i.e. it cannot contain duplicate\n",
+    "# It does not maintain sort order\n",
+    "# list.sort has key parameter which can be used to sort the list using specific way\n",
+    "def puzzling_fun(my_list):\n",
+    "    my_set = set(my_list) # this will get the unique elements from my_list\n",
+    "    my_new_list = list(my_set) # convert it to list again\n",
+    "    my_new_list.sort(key=my_list.index) # because set does not maintain order \n",
+    "    #                                   # we will sort the list again with index of initial list\n",
+    "    return my_new_list\n",
+    "\n",
+    "my_list = list('entrepreneurial')\n",
+    "print(puzzling_fun(my_list))\n",
+    "# ['e', 'n', 't', 'r', 'p', 'u', 'i', 'a', 'l']\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "FDX\n",
+      "-22.42%\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Day 1 question from twitter https://twitter.com/bbelderbos/status/1736790788544057552\n",
+    "# Tuple unpacking and how to discard elements from the list using throway *_ variable\n",
+    "\n",
+    "fields = ['FDX', 'FedEx Corporation', '158.94', '-45.93', '-22.42%']\n",
+    "symbol, name, price, *_ = fields # except first 3 elements discard rest of the elements of the list\n",
+    "print(symbol)\n",
+    "symbol, *_, value1 = fields # except first and last elements of the list discard all other values\n",
+    "print(value1) \n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "0.03952956199645996\n",
+      "0.0016777515411376953\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Day 1 efficient method of joining elements of the list using .join https://twitter.com/bbelderbos/status/1736726322880151590\n",
+    "\n",
+    "import time\n",
+    "\n",
+    "words = [\"word\"] * 100_000\n",
+    "\n",
+    "# inefficient string concatenation\n",
+    "start_time = time.time()\n",
+    "sentence = \"\"\n",
+    "for w in words:\n",
+    "    sentence += w\n",
+    "print(time.time() - start_time)  # 0.9659469127655029\n",
+    "\n",
+    "# more efficient string concat using .join() on list\n",
+    "start_time = time.time()\n",
+    "sentence = \" \".join(words)\n",
+    "print(time.time() - start_time)  # 0.001013040542602539 \n",
+    "#print(sentence)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[(1, 2), (3, 4), (5, 6), (7, 8), (9, 10)]\n",
+      "1 2\n",
+      "3 4\n",
+      "5 6\n",
+      "7 8\n",
+      "9 10\n"
+     ]
+    }
+   ],
+   "source": [
+    "numbers = range(1, 11)\n",
+    "pairs = list(zip(numbers[::2], numbers[1::2]))\n",
+    "print(pairs)  # [(1, 2), (3, 4), (5, 6), (7, 8), (9, 10)]\n",
+    "\n",
+    "for i , j in zip(numbers[::2], numbers[1::2]):\n",
+    "    print(i, j)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "dashboard",
+   "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": "3.10.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}