A standalone library to download European Central Bank foreign exchange reference rates.

This library was written as a showcase piece of code for a prospective employer. It is not intended to be used in production environment, however, it may work. Use at your own discretion. Due to the nature of the motivation for writing this library it is at times arguably over-complicated and against YAGNI principle. No Python Zen monks were actually harmed in the process.

from gwaith import get_rates

for rates in get_rates():
    print(rates)

# or
only = ('PLN', 'GBP')
for data in get_rates(processor=processors.to_json, only=only):
    print(data)

# or see bin/hand_test_lib_main.py for usage examples

Tiny functions allowing you to return the data in some common formats. Feel free to write your own. Have a look at gwaith.processors to understand the API.

❗ The processors extra installs dependencies needed by the raw_python processor, only install if you plan to use this processor. This is to limit number of dependencies (by half 🤘).

From GitHub only, there are no plans to release it to PyPi.

pip install git+ssh://git@github.com/bartekbrak/gwaith.git
pip install git+ssh://git@github.com/bartekbrak/gwaith.git#egg=gwaith[processors]

git clone git@github.com:bartekbrak/gwaith.git
cd gwaith
pip install -e . -r dev_requirements.txt
pip install -e[processors] . -r dev_requirements.txt

pip install -r dev_requirements.txt
py.test
# run tests connecting to the Internet
py.test -m 'online'
# also have a look in setup.cfg to learn the hardcoded py.test args

The library makes a few assumtions about the data that ECB provides that might not hold and would require extra live testing:

• The library does not allow controlling how many days back should be taken into account
• Currency feeds provide rates on distinct dates, if this breaks and two identical dates are provided, the earlier will be forgotten
• The CSV processor creates a generator, this for the sake of the API consistency but this processor does not return anything, it writes directly to the object provided, be it stdout or file, this might be surprising to the end user

• Allow limiting days back that rates are collected from, currently at whatever RSS gives, as of time of writing, five working days

I do not plan to expand the library, so fork the code and treat as your own.

gwaith contains the library, bin convenience shell scripts.

Released under MIT License.