VistaFetch

VistaFetch is a simple and lightweight Python library for financial asset data retrieval (stocks, ETFs, etc.) from onvista.de.

Warning

The API used by this package is not public. Therefore, users should assume that using this package may violate the site's terms of use. The author of this package takes no responsibility for how individuals use the code. It is important to use the code respectfully and judiciously, keeping in mind the potential consequences of violating the terms of service and applicable laws. Users are encouraged to read the API Terms and Conditions, Acceptable Use Policy, and License Agreements before using any API. These agreements outline the legal, business, and technical considerations that apply to the use of an API.

⚡️ Quickstart

Please ensure that vistafetch is installed on your machine by running the following command:

pip install vistafetch

The first step is to initiate the client (VistaFetchClient):

from vistafetch import VistaFetchClient

client = VistaFetchClient()

🔎 Exploratory search

The client now enables you to search for assets and allows you to investigate the results:

result = client.search_asset(
    search_term="S&P",
)
result.visualize()

This produces the following console output:

               Financial assets discovered                
┏━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┓
┃ Index ┃      Name      ┃   Asset Type   ┃     ISIN     ┃
┡━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━┩
│   0   │    S&P 500     │     INDEX      │ US78378X1072 │
│   1   │ Siemens Energy │     STOCK      │ DE000ENER6Y0 │
│   2   │  Silberpreis   │ PRECIOUS_METAL │ XC0009653103 │
│   3   │      SAP       │     STOCK      │ DE0007164600 │
│   4   │ EURO STOXX 50  │     INDEX      │ EU0009658145 │
└───────┴────────────────┴────────────────┴──────────────┘

One now can access the asset of choice:

asset = result.get(3)  # returns SAP in this case

# in case one simply wants the first one, the following shorthand takes you there
asset = result.get()

One can now access several parameters of the asset or convert them to a JSON string as show below.

print(asset.isin)
print(asset.as_json())

DE0007164600
{
  "display_type":"Aktie",
  "entity_type":"STOCK",
  "isin":"DE0007164600",
  "name":"SAP",
  "tiny_name":"SAP",
  "wkn":"716460",
}

As a final step, the asset provides some recent price-related data:

print(asset.get_latest_price_data().as_json())

{
  "currency_symbol":"EUR",
  "datetime_high":"2023-08-25T14:17:15Z",
  "datetime_last":"2023-08-25T15:37:14Z",
  "datetime_low":"2023-08-25T15:02:12Z",
  "datetime_open":"2023-08-25T07:00:26.999000Z",
  "high":127.24,
  "last":126.16,
  "low":125.66,
  "open":126.2,
}

In addition, you directly access the individual values, e.g., price value last:

asset.get_latest_price_data().last

126.16

Warning

Price data are currently not supported for indexes. Feel free to send me a feature request if you'd like to see this feature supported for other asset types as well: https://github.com/bossenti/vistafetch/issues/new. As an alternative, contributions are welcome at any time.

🎯 Targeted search

In case you already know the identifier for your asset (both ISIN and WKN are supported), you can directly query them. This returns then only one result:

result = client.search_asset(
    search_term="DE0007164600",  # alternatively pass the WKN here
)
sap_stock = result.get()

🐛 Facing problems

Feel free to open an issue if you experience strange behavior or bugs when using vistafetch.
If you are not sure if your problem should be considered a bug or if you have a question in general, reach out via discussions.

💻 Contributing

We welcome and appreciate contributions of any size. or smaller or straightforward changes, feel free to create a pull request directly. If you plan to make significant improvements or extensions, please open an issue or disussion beforehand.

Initial Setup

For your convenience, please ensure that you have Poetry and Just installed. You can read more on them by following the links below:

• poetry
• just

To get all required dependencies installed, simply start with:

just poetry-install

Additionally, we make use of pre-commit. To set it up, run the following command:

pre-commit install

To verify that everything is set up correctly, execute the test suite:

just unit-tests

Code Conformance

Once you implemented your changes, please run the following commands:

just pretty   # formats the code and applies automatic linting fixes
just check  # checks code for conformance

Opening PR

Please be aware that this repository follows conventional commit. So please choose a PR title corresponding to the following:

<scope>(#<IssueID>): <description>  # supported scopes can be found here: https://github.com/commitizen/conventional-commit-types/blob/master/index.json

# e.g.
docs(#8): provide extensive project readme

# issue id is optional, so the following si valid as well
docs: provide extensive project readme