wallstreet.py 文件源码

def __init__(self, quote, opt_type, d=date.today().day, m=date.today().month,
                 y=date.today().year, strict=False, source='google'):

        self.source = source.lower()
        self.underlying = Stock(quote, source=self.source)

        if self.source == 'google':
            self._google(quote, d, m, y)

        elif self.source == 'yahoo':
            self._yahoo(quote, d, m, y)

        self._exp = [exp for exp in self._exp if exp not in self._skip_dates[opt_type]]
        self.expirations = [exp.strftime(DATE_FORMAT) for exp in self._exp]
        self.expiration = date(y, m, d)

        try:
            if opt_type == 'Call':
                self.data = self.data['calls']
            elif opt_type == 'Put':
                self.data = self.data['puts']
            assert self.data

        except (KeyError, AssertionError):
            if self._expiration in self._exp:  # Date is in expirations list but no data for it
                self._skip_dates[opt_type].add(self._expiration)
                self._exp.remove(self._expiration)
                self._has_run = False

            if all((d, m, y)) and not self._has_run and not strict:
                closest_date = min(self._exp, key=lambda x: abs(x - self._expiration))
                print('No options listed for given date, using %s instead' % closest_date.strftime(DATE_FORMAT))
                self._has_run = True
                self.__init__(quote, closest_date.day, closest_date.month, closest_date.year, source=source)
            else:
                raise ValueError('Possible expiration dates for this option are:', self.expirations) from None