def __init__(self, start=None, end=None):
if start is None:
self.start = self.observation_start_date
else:
self.start = DateHelper.make_date(start)
if end is None:
self.end = DateHelper.today()
else:
self.end = DateHelper.make_date(end)
class CBR_USD(ParserBase):
"""Bank of Russia official USD to RUB exchange rate"""
freq = 'd'
observation_start_date = DateHelper.make_date('1992-01-01') # '1991-07-01'
reference = dict(
source_url="http://www.cbr.ru/scripts/Root.asp?PrtId=SXML",
varnames=['USDRUR_CB'])
def _yield_dicts(self):
return cbr_fx.get_cbr_er(self.start, self.end)
def sample(self):
"""Yields dictionaries with sample datapoints."""
return iter([{
'date': '2017-09-15',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 57.7706
}, {
'date': '2017-09-16',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 57.5336
}, {
'date': '2017-09-19',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 57.6242
}, {
'date': '2017-09-20',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 58.0993
}, {
'date': '2017-09-21',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 58.129
}, {
'date': '2017-09-22',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 58.2242
}, {
'date': '2017-09-23',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 57.6527
}, {
'date': '2017-09-26',
'freq': 'd',
'name': 'USDRUR_CB',
'value': 57.566
}])
class BrentEIA(ParserBase):
"""Brent oil price from US EIA"""
freq = 'd'
observation_start_date = DateHelper.make_date('1987-05-15')
reference = dict(
source_url='https://www.eia.gov/opendata/qb.php?category=241335',
varnames=['BRENT'])
def _yield_dicts(self):
# brent always returns full dataset, need truncate for start_date
for p in brent.yield_brent_dicts():
if DateHelper.make_date(p['date']) >= self.start:
yield p
def sample(self):
"""Yield a few dictionaries with datapoints."""
return iter([{
'date': '2017-09-18',
'freq': 'd',
'name': 'BRENT',
'value': 55.5
}, {
'date': '2017-09-15',
'freq': 'd',
'name': 'BRENT',
'value': 56.18
}, {
'date': '2017-09-14',
'freq': 'd',
'name': 'BRENT',
'value': 56.76
}, {
'date': '2017-09-13',
'freq': 'd',
'name': 'BRENT',
'value': 55.52
}, {
'date': '2017-09-12',
'freq': 'd',
'name': 'BRENT',
'value': 55.06
}, {
'date': '2017-09-11',
'freq': 'd',
'name': 'BRENT',
'value': 54.2
}])
class RosstatKEP_Base(ParserBase):
observation_start_date = DateHelper.make_date('1999-01-31')
reference = dict(source_url=("http://www.gks.ru/wps/wcm/connect/"
"rosstat_main/rosstat/ru/statistics/"
"publications/catalog/doc_1140080765391"),
varnames=['GDP', 'CPI', 'etc'])
freq = None #overload this in child classes
def _yield_dicts(self):
return kep.yield_kep_dicts(self.freq)
def sample(self):
yield {
"date": "2015-11-30",
"freq": self.freq,
"name": "CPI_rog",
"value": 100.8
}
yield {
"date": "2015-11-30",
"freq": self.freq,
"name": "RUR_EUR_eop",
"value": 70.39
}
yield {
"date": "2015-12-31",
"freq": self.freq,
"name": "CPI_rog",
"value": 100.8
}
yield {
"date": "2015-12-31",
"freq": self.freq,
"name": "RUR_EUR_eop",
"value": 79.7
}
def test_on_invalid_format(self):
with pytest.raises(Exception):
assert DateHelper.make_date('25-03-2000', '%dk%m-%Y')
def test_with_fmt_on_valid_format_day_month_year(self):
date = DateHelper.make_date('25-03-2000', fmt='%d-%m-%Y')
assert date == datetime.date(2000, 3, 25)
def test_on_invalid_month_raises_ValueError(self):
with pytest.raises(ValueError):
DateHelper.make_date('2007-25-25')
def test_make_date_on_no_argument_raises_TypeError(self):
with pytest.raises(TypeError):
DateHelper.make_date()
def test_make_date_on_empty_str_raises_Exception(self):
with pytest.raises(Exception):
DateHelper.make_date('')
def test_on_none_returns_today(self):
assert DateHelper.make_date(None) == datetime.date.today()
def test_accepts_slashed_format(self):
date = DateHelper.make_date('2007/01/25')
assert date.day == 25
assert date.month == 1
assert date.year == 2007
def test_accepts_YYYY_MM_DD(self):
date = DateHelper.make_date('2007-01-25')
assert date.day == 25
assert date.month == 1
assert date.year == 2007
def test_returns_datetime_date_type(self):
date = DateHelper.make_date('2007-01-25')
assert isinstance(date, datetime.date)
def is_date_in_range(d):
dt = DateHelper.make_date(d['date'])
return dt >= self.start and dt <= self.end
def _yield_dicts(self):
# brent always returns full dataset, need truncate for start_date
for p in brent.yield_brent_dicts():
if DateHelper.make_date(p['date']) >= self.start:
yield p