To test some theories, I created a new class variable, an int named
N1, which is not mutable. So my Stock class now looks as follows:
class Stock(object):
NStocks = [] #Class variables
N1 = 0
def __init__(self, id, returnHistory):
self.id = id
self.retHist = returnHistory
Stock.N1 += 1
for i in range(len(returnHistory)):
if len(Stock.NStocks) <= i and retHist[i] != '':
Stock.NStocks.append(1)
elif len(Stock.NStocks) <= i and retHist[i] == '':
Stock.NStocks.append(0)
elif retHist[i] != '':
Stock.NStocks[i] +=1
I expect Stock.N1 to reset to zero at each call to simulation(), but
it does not - it keeps incrementing!
I then added a line to simulation( ) that deletes all the stocks at
the end of each simulation (see below). You guessed it - no change!
NStocks and N1 keep increasing! At this point I am thoroughly
mystified. What gives?
def simulation(N, par1, par2, idList, returnHistoryDir):
port = []
for i in range(N):
port.append( Stock(idList[i], returnHistoryDir[idList[i]] )
del port[:]
results = ......
print results.
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