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exchange_rates.py
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exchange_rates.py
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import csv
from pathlib import Path
import requests
import datetime
from requests import Response
data_dir = (Path.home() / 'currency_data')
data_dir.mkdir(exist_ok=True)
url = 'http://api.exchangeratesapi.io/v1/'
endpoint = 'latest'
payload = {
'access_key': 'Place your token here',
'base': 'EUR',
'symbols': 'PLN, USD, GBP'
}
def connect_to_api_url() -> Response:
try:
return requests.get(url + endpoint, params=payload)
except requests.exceptions.HTTPError as http_err:
raise SystemExit(http_err)
def get_currency_data() -> dict:
currency = connect_to_api_url()
return currency.json()['rates']
def datetime_format() -> str:
current_date = datetime.datetime.now()
return str(current_date.strftime('%d_%b_%Y_%H_%M_'))
def save_to_csv() -> None:
with open(f'{data_dir}/{datetime_format()}currency_rates.csv', mode='w') as csv_f:
fieldnames = ['PLN', 'USD', 'GBP']
writer = csv.DictWriter(csv_f, fieldnames=fieldnames, delimiter=';')
writer.writeheader()
writer.writerow(get_currency_data())
def del_oldest_file() -> None:
count = 0
for file in data_dir.iterdir():
count += 1
if file.is_file() and count > 7:
oldest = min([file for file in data_dir.resolve().glob('*.csv')], key=Path)
oldest.unlink()
def main():
save_to_csv()
del_oldest_file()
if __name__ == '__main__':
main()