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LLM_Engineering_OLD/week1/community-contributions/Week1_Day1_Flight_Prices_Tracker.ipynb
2025-09-07 16:11:34 -04:00

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{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"id": "fdc2f470",
"metadata": {},
"outputs": [],
"source": [
"# imports\n",
"\n",
"import os\n",
"import requests\n",
"from dotenv import load_dotenv\n",
"from bs4 import BeautifulSoup\n",
"from IPython.display import Markdown, display\n",
"from openai import OpenAI\n",
"\n",
"# If you get an error running this cell, then please head over to the troubleshooting notebook!"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "5f0fbd79",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"API key found and looks good so far!\n"
]
}
],
"source": [
"# Load environment variables in a file called .env\n",
"\n",
"load_dotenv(override=True)\n",
"api_key = os.getenv('OPENAI_API_KEY')\n",
"\n",
"# Check the key\n",
"\n",
"if not api_key:\n",
" print(\"No API key was found - please head over to the troubleshooting notebook in this folder to identify & fix!\")\n",
"elif not api_key.startswith(\"sk-proj-\"):\n",
" print(\"An API key was found, but it doesn't start sk-proj-; please check you're using the right key - see troubleshooting notebook\")\n",
"elif api_key.strip() != api_key:\n",
" print(\"An API key was found, but it looks like it might have space or tab characters at the start or end - please remove them - see troubleshooting notebook\")\n",
"else:\n",
" print(\"API key found and looks good so far!\")\n"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "b771480a",
"metadata": {},
"outputs": [],
"source": [
"openai = OpenAI()"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "0e97974c",
"metadata": {},
"outputs": [],
"source": [
"# A class to represent a Webpage\n",
"# If you're not familiar with Classes, check out the \"Intermediate Python\" notebook\n",
"\n",
"# Some websites need you to use proper headers when fetching them:\n",
"headers = {\n",
" \"User-Agent\": \"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36\"\n",
"}\n",
"\n",
"class Website:\n",
"\n",
" def __init__(self, url):\n",
" \"\"\"\n",
" Create this Website object from the given url using the BeautifulSoup library\n",
" \"\"\"\n",
" self.url = url\n",
" response = requests.get(url, headers=headers)\n",
" soup = BeautifulSoup(response.content, 'html.parser')\n",
" self.title = soup.title.string if soup.title else \"No title found\"\n",
" for irrelevant in soup.body([\"script\", \"style\", \"img\", \"input\"]):\n",
" irrelevant.decompose()\n",
" self.text = soup.body.get_text(separator=\"\\n\", strip=True)"
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "2ec62fb3",
"metadata": {},
"outputs": [],
"source": [
"# Define our system prompt - you can experiment with this later, changing the last sentence to 'Respond in markdown in Spanish.\"\n",
"\n",
"system_prompt = \"You are an assistant that analyzes the contents of a website \\\n",
"and provides a list of the flights available according to what user asks for, ignoring text that might be navigation related. \\\n",
"Respond in markdown.\""
]
},
{
"cell_type": "code",
"execution_count": 6,
"id": "7a93a605",
"metadata": {},
"outputs": [],
"source": [
"# A function that writes a User Prompt that asks for summaries of websites:\n",
"\n",
"def user_prompt_for(website):\n",
" user_prompt = f\"You are looking at a website titled {website.title}\"\n",
" user_prompt += \"\\nThe contents of this website is as follows; \\\n",
"please provide a list of all the flights available in a table format in markdown. The columns of the table should be - Flight carrier, Flight Dat and times, Fare, No. of stops. \\\n",
"Provide exact flight carriers. If it includes ads or offers, then summarize these too.\\n\\n\"\n",
" user_prompt += website.text\n",
" return user_prompt"
]
},
{
"cell_type": "code",
"execution_count": 7,
"id": "597646e5",
"metadata": {},
"outputs": [],
"source": [
"def fetch_flights(from_tx,to_tx, date_from,date_to=''):\n",
" website = Website(f\"https://www.ca.kayak.com/flights/{from_tx}-{to_tx}/{date_from}/{date_to}\")\n",
" user_prompt = user_prompt_for(website)\n",
" messages = [{\"role\":\"system\",\"content\":system_prompt},{\"role\":\"user\",\"content\":user_prompt}]\n",
" response = openai.chat.completions.create(model=\"gpt-4o-mini\", messages=messages)\n",
" display(Markdown(response.choices[0].message.content))"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "47ae61f3",
"metadata": {},
"outputs": [
{
"data": {
"text/markdown": [
"Here is the list of available flights from YYZ to DEL on 9/11:\n",
"\n",
"| Flight Carrier | Flight Date and Times | Fare | No. of Stops |\n",
"|----------------|-----------------------|--------|--------------|\n",
"| Air Canada | 9/11, 10:00 AM | C$ 833 | 1 |\n",
"| Lufthansa | 9/11, 5:00 PM | C$ 847 | 2 |\n",
"| Qatar Airways | 9/11, 1:30 PM | C$ 1,559| 1 |\n",
"\n",
"### Summary of Offers\n",
"- The cheapest fare is C$ 833 with a travel time of 23 hours and 35 minutes.\n",
"- The best fare option is C$ 847 with a travel time of 22 hours and 20 minutes.\n",
"- The quickest option is priced at C$ 1,559 with a travel duration of 13 hours and 55 minutes. \n",
"\n",
"*Note: Prices are per person and do not include baggage fees.*"
],
"text/plain": [
"<IPython.core.display.Markdown object>"
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"fetch_flights('yyz','del','2025-11-09')"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "3a48ceb6",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"id": "15bb1a04",
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": null,
"id": "902975bf",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "venv",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
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"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
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