def __init__(self
, symbol
, startdate_string='2004-12-31'
, period = 'monthly' #or daily
, source = 'Yahoo'
#, enddate_string='xxx'
):
print('Initialized class pullreturns.perform')
self.Symbol = symbol
self.StartDateString = startdate_string
self.Period = period
import datetime
#today_datetime = datetime.datetime.today()
#today_date = datetime.date.today()
yesterday_date = datetime.date.fromordinal(datetime.date.today().toordinal()-1)
import pullprices as pp
if period == 'monthly':
self.StockHistoryDataframe = pp.stockhistorybackfilledtodatframeofstockhistoryinstancesusingcache(symbol,startdate_string,str(yesterday_date)) #,str(today_date))
self.ReturnsDataframe = self.monthlyreturns
else:
self.StockHistoryDataframe = pp.stockhistorynobackfilltodataframeusingcache(symbol,startdate_string,str(yesterday_date)) #,str(today_date))
self.ReturnsDataframe = self.dailyreturns
def __init__(
self,
symbol,
startdate_string='2004-12-31',
enddate_string='',
period='monthly' #or daily
,
source='Yahoo'
#, enddate_string='xxx'
):
print('Initialized class pullreturns.perform')
#today_date = datetime.date.today()
self.Symbol = symbol
self.StartDateString = startdate_string
self.EndDateString = enddate_string
self.Period = period
import datetime
#today_datetime = datetime.datetime.today()
startdate_date = datetime.datetime.strptime(startdate_string,
"%Y-%m-%d")
my_enddate_string = enddate_string
yesterday_date = datetime.date.fromordinal(
datetime.date.today().toordinal() - 1)
if len(my_enddate_string) == 0:
my_enddate_string = str(yesterday_date)
enddate_date = datetime.datetime.strptime(my_enddate_string,
"%Y-%m-%d")
if enddate_date <= startdate_date:
my_enddate_string = str(yesterday_date)
import pullprices as pp
if period == 'monthly':
self._StockHistoryDataframe = pp.stockhistorybackfilledtodatframeofstockhistoryinstancesusingcache(
symbol, startdate_string,
my_enddate_string) #,str(today_date))
#self.MonthDayCharacter = 'M'
else:
self._StockHistoryDataframe = pp.stockhistorynobackfilltodataframeusingcache(
symbol, startdate_string,
my_enddate_string) #,str(today_date))
#self.MonthDayCharacter = 'D'
#Append todays price if no end date specified
appendtodaysprice = False
if enddate_string == '':
appendtodaysprice = True
self.ReturnsDataframe = self.calculatereturns(
period=period, appendtodaysprice=appendtodaysprice)
self.PriceHistoryDataframe = self.getpricehistory(
period=period, appendtodaysprice=appendtodaysprice)
self.FirstDateOfPriceHistory = self.PriceHistoryDataframe.index.tolist(
)[0]