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AttributeError: 'Positions' object has no attribute 'itervalues'

Hi there, I met a problem which works before, any solutions??
I saw the error in title at line
" for position in context.portfolio.positions.itervalues():" in the below codes:

def count_positions(context,data):

longs = 0  
for position in context.portfolio.positions.itervalues():  
    if position.amount > 0:  
        longs += 1  
leverage=context.account.leverage  
# asset=context.portfolio.portfolio_value  
# record(asset=asset)  
record(longs=longs)  
record(leverage=leverage)  
2 responses

The new Python 3.5 doesn't support itervalues() the way it was in Python 2.5. Simply use values instead. (See https://portingguide.readthedocs.io/en/latest/dicts.html)

for position in context.portfolio.positions.values():  
    if position.amount > 0:  
        longs += 1  

Alternately, the same thing can be accomplished with list comprehension like this

longs = len([position for position in context.portfolio.positions.values() if position.amount>0])
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Thank you so much, it works.