from .. import rate as oxrrate
def format_one_rate(rate, from_amt, from_curr, to_curr):
return "{:g} {} = {:g} {}".format(
from_amt, from_curr, rate.convert(from_amt, from_curr, to_curr), to_curr)
def format_rate_pair(rate, from_curr, to_curr):
yield format_one_rate(rate, 1, from_curr, to_curr)
yield format_one_rate(rate, 1, to_curr, from_curr)
def run(config, stdout, stderr):
loaders = config.get_loaders()
with loaders.historical(config.args.date, config.args.base) as rate_json:
rate = oxrrate.Rate.from_json_file(rate_json)
if loaders.should_cache():
config.cache.save_rate(rate)
if not config.args.from_currency:
for from_curr in sorted(rate.rates):
print(*format_rate_pair(rate, from_curr, config.args.to_currency),
sep='\n', file=stdout)
elif config.args.amount is None:
print(*format_rate_pair(rate, config.args.from_currency, config.args.to_currency),
sep='\n', file=stdout)
else:
print(format_one_rate(rate, config.args.amount,
config.args.from_currency, config.args.to_currency),
file=stdout)