marketstack-python

Inofficial Python OpenAPI implementation of the marketstack API based on the marketstack OpenAPI spec.

Usage

Configuration (recommended)

Set up your API key and TLS support as ENV variables.

MARKETSTACK_API_KEY="xyz"
MARKETSTACK_TLS_SUPPORT="1"

Create your client

from marketstack.client import Client
import os

def create_client() -> tuple[Client, str]:  
    access_key = os.getenv("MARKETSTACK_API_KEY")
    assert access_key is not None and len(access_key) > 0, "Environment variable MARKETSTACK_API_KEY is not defined"

    tls_support = os.getenv("MARKETSTACK_TLS_SUPPORT")
    protocol = "https" if tls_support == "1" else "http"
    client = Client(base_url=f"{protocol}://api.marketstack.com/v1")
    
    return client, access_key 

Call operations

from marketstack.api.eod import eod

client, access_key = create_client()

response = eod.sync(
    client=client,
    access_key=access_key,
    symbols="AAPL,AMZN",
    limit=10,
)

All endpoint features are implemented and tested. For examples see the repository's tests/ directory.

Multiple asynchronous calls

import asyncio
from typing import List
from marketstack.api.intraday import intraday_latest
from marketstack.api.exchanges import exchanges
from marketstack.models import PagedResponseListmodelsIntervalPrice, PagedResponseListmodelsExchange

async def load_async(symbols: List[str]):
   client, access_key = create_client()
   
   prices_call = intraday_latest.asyncio(access_key=access_key, client=client, symbols=",".join(symbols))
   exchanges_call = exchanges.asyncio(access_key=access_key, client=client)
   
   # Type hints for future results
   prices_response: PagedResponseListmodelsIntervalPrice
   exchanges_response: PagedResponseListmodelsExchange
   
   prices_response, exchanges_response = await asyncio.gather(prices_call, exchanges_call)

Error handling

from marketstack.models import ErrorCode, ErrorResponse

if isinstance(response, ErrorResponse):
    assert response.error.code == ErrorCode.FUNCTION_ACCESS_RESTRICTED

Map to Pandas dataframe

import pandas as pd

df = pd.DataFrame(map(lambda x: x.__dict__, response.data))

Developers area

Generate the client

1. Install the OpenAPI client generator

   pip install openapi-python-client

2. Regenerate the client

   ./regenerate.sh

Run the tests

1. Setup your marketstack API key in tests/test.env
2. Run the tests via pytest

   PYTHONPATH="." pytest --cov=marketstack tests/

Release update

1. Update version in setup.py
2. Package library

   python setup.py sdist

3. Publish library

   twine upload dist/marketstack-[version].tar.gz

References

• https://github.com/MichaelKim0407/tutorial-pip-package
• https://packaging.python.org/en/latest/guides/making-a-pypi-friendly-readme/