"To accomplish this task, we would use the `yfinance` library to fetch data from Yahoo Finance, `pandas` library for data manipulation, and `matplotlib` for data visualization.\n",
"\n",
"Steps:\n",
"1. Identify the tickers for the top 7 largest publicly listed companies. Currently, these companies are: Apple (AAPL), Microsoft (MSFT), Google (GOOGL), Amazon (AMZN), Facebook (FB), Tesla (TSLA), and Berkshire Hathaway (BRK-A).\n",
"2. Fetch market cap information for these companies using yfinance.\n",
"3. Clean and process the fetched data into a usable format (a pandas DataFrame).\n",
"4. Plot the market caps for these companies.\n",
"\n",
"Let's start by fetching data for these companies.\n",
"plt.title('Market Caps of Top 7 Publicly Listed Companies')\n",
"plt.gca().invert_yaxis()\n",
"plt.show()\n",
"```\n",
"\n",
"Please note that the start and end dates used while fetching data specifies the time period we are interested in. Feel free to modify these as needed. The 'marketCap' obtained from the 'info' property of the Ticker object represents the market cap as of the end date.\n",
"\n",
"Also note that the final plot shows the companies in descending order of market cap, with the company with the highest market cap at the top of the chart.\n",
"Code output: Requirement already satisfied: yfinance in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (0.2.36)\n",
"Requirement already satisfied: pandas in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (2.2.1)\n",
"Requirement already satisfied: matplotlib in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (3.8.3)\n",
"Requirement already satisfied: numpy>=1.16.5 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (1.26.4)\n",
"Requirement already satisfied: requests>=2.31 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (2.31.0)\n",
"Requirement already satisfied: multitasking>=0.0.7 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (0.0.11)\n",
"Requirement already satisfied: lxml>=4.9.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (5.0.1)\n",
"Requirement already satisfied: appdirs>=1.4.4 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (1.4.4)\n",
"Requirement already satisfied: pytz>=2022.5 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (2023.3.post1)\n",
"Requirement already satisfied: frozendict>=2.3.4 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (2.4.0)\n",
"Requirement already satisfied: peewee>=3.16.2 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (3.17.0)\n",
"Requirement already satisfied: beautifulsoup4>=4.11.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (4.12.2)\n",
"Requirement already satisfied: html5lib>=1.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from yfinance) (1.1)\n",
"Requirement already satisfied: python-dateutil>=2.8.2 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from pandas) (2.8.2)\n",
"Requirement already satisfied: tzdata>=2022.7 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from pandas) (2023.4)\n",
"Requirement already satisfied: contourpy>=1.0.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (1.2.0)\n",
"Requirement already satisfied: cycler>=0.10 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (0.12.1)\n",
"Requirement already satisfied: fonttools>=4.22.0 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (4.47.2)\n",
"Requirement already satisfied: kiwisolver>=1.3.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (1.4.5)\n",
"Requirement already satisfied: packaging>=20.0 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (23.2)\n",
"Requirement already satisfied: pillow>=8 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (10.2.0)\n",
"Requirement already satisfied: pyparsing>=2.3.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from matplotlib) (3.1.1)\n",
"Requirement already satisfied: soupsieve>1.2 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from beautifulsoup4>=4.11.1->yfinance) (2.5)\n",
"Requirement already satisfied: six>=1.9 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from html5lib>=1.1->yfinance) (1.16.0)\n",
"Requirement already satisfied: webencodings in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from html5lib>=1.1->yfinance) (0.5.1)\n",
"Requirement already satisfied: charset-normalizer<4,>=2 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from requests>=2.31->yfinance) (3.3.2)\n",
"Requirement already satisfied: idna<4,>=2.5 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from requests>=2.31->yfinance) (3.6)\n",
"Requirement already satisfied: urllib3<3,>=1.21.1 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from requests>=2.31->yfinance) (1.26.18)\n",
"Requirement already satisfied: certifi>=2017.4.17 in /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages (from requests>=2.31->yfinance) (2024.2.2)\n",
"/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[************** 29%% ] 2 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[********************* 43%% ] 3 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[**********************57%%* ] 4 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[**********************71%%******** ] 5 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"From the error message, it seems that the 'FB' ticker (Facebook) failed to download because it might have been delisted. This is likely due to Facebook's corporate rebranding to Meta Platforms Inc. in late 2021, which resulted in a ticker change from 'FB' to 'META'.\n",
"\n",
"To resolve this, we'll replace 'FB' in our tickers list with 'META' and then retrieve the data again. Here is the modified code:\n",
"Code output: /Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[ 0%% ]/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[********************* 43%% ] 3 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[**********************57%%* ] 4 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"[**********************71%%******** ] 5 of 7 completed/Users/ekzhu/miniconda3/envs/autogen/lib/python3.11/site-packages/yfinance/utils.py:775: FutureWarning: The 'unit' keyword in TimedeltaIndex construction is deprecated and will be removed in a future version. Use pd.to_timedelta instead.\n",
"I see that the fetched data was successfully retrieved and processed. However, it looks like the result of the plot isn't visible, so we don't know whether the plot was generated successfully. Please run the code again and provide the output of the plot.\n",
"\n",
"If there are any issues or any other points you would like me to help with, let me know!\n",
"I'm glad we were able to retrieve and process the data successfully. Please try running the last part of the code again to generate and display the plot:\n",
"plt.title('Market Caps of Top 7 Publicly Listed Companies')\n",
"plt.gca().invert_yaxis()\n",
"plt.show()\n",
"```\n",
"\n",
"This section of the code creates a horizontal bar plot of the market capitalizations of the companies. The `plt.gca().invert_yaxis()` line is included to invert the y-axis, so the company with the highest market cap is at the top of the chart.\n",
"I see that the code has executed successfully, but unfortunately, the generated plot is not visible here. However, given that there are no errors, it's likely that the plot has been created as expected when you executed the code on your end.\n",
"\n",
"If you have any other questions related to this code or need further assistance with Python coding or data visualization, please let me know! I'm here to help.\n",
"\n",
"Otherwise, if this completes your initial request, I will end this task. Just let me know your decision.\n",
"Alright. If you have any more questions regarding this task, or if you need help with other tasks in the future, don't hesitate to ask. Have a great day!\n",