dolar_hoy.py

#!/usr/bin/env python3

import requests
from requests.exceptions import ConnectionError
import json
import locale
from bs4 import Tag, NavigableString, BeautifulSoup

"""
Set locale to es_ES
"""
locale.setlocale(locale.LC_ALL, 'es_ES')

def dolar_galicia():
    url = 'https://www.bancogalicia.com/cotizacion/cotizar?currencyId=02&quoteType=SU&quoteId=999'
    try:
        resp = requests.get(url)
    except ConnectionError as error:
        print(error)
        return

    obj = resp.json()
    if 'error' in obj:
        print ('Valor no disponible')
        return 
    print_quotation('Galicia', ( locale.atof(obj['buy']), locale.atof(obj['sell'])))

def dolar_BNA(): 
    url = 'http://www.bna.com.ar/Personas'
    resp = requests.get(url)
    resp.raise_for_status()
    parsedHTML = BeautifulSoup(resp.text, "html.parser")
    panel_monedas = parsedHTML.select('#billetes')[0]
    dolar = panel_monedas.select('.tit')[0]
    xx = list(dolar.parent.children)
    """ Remove '\n' by filtering out NavigableString objects who represent carriage return"""
    _, buy, sell = list(filter(lambda x: not isinstance(x, NavigableString), xx))
    print_quotation('BNA', (locale.atof(buy.text), locale.atof(sell.text)))
    

def print_quotation(bankName, quote):
    print(bankName.center(20, '='))
    print('Compra | Venta')
    print("{0:.2f} {1:.2f}".format(quote[0], quote[1]))

if __name__ == "__main__":
    dolar_galicia()
    dolar_BNA()