I'm trying to run futures through my algo but not quite sure how to do it I guess. I keep getting ... TypeError: unhashable type: 'list'
USER ALGORITHM:135, in handle_data
current_position = context.portfolio.positions[context.future].amount

how do I fix this?? Thanks everyone!!!!

below is some of the code.....................................................

# Rates  
'rates': {  
    'us_2y': continuous_future('TU'),  
    'us_5y': continuous_future('FV'),  
    'us_10y': continuous_future('TY'),  
    'us_30y': continuous_future('US'),  
    'deliverable_interest_rate_swap_5y': continuous_future('FI'),  
    'deliverable_interest_rate_swap_10y': continuous_future('TN'),  
    'interest_rate_swap_5y': continuous_future('FS'),  
    'interest_rate_swap_10y': continuous_future('TS'),  
    'municipal_bonds': continuous_future('MB'),  
    'utra_tbond': continuous_future('UB'),  
    'tbills': continuous_future('TB'),  
    'fed30day': continuous_future('FF'),  
    'eur': continuous_future('ED'),  
    'eurodollar_nyse_liffe': continuous_future('EL'),  
},  

}

futures = []  
context.future = futures

def handle_data(context, data):

prices_custom_high = data.history(context.future, 'high', 30, '1d').iloc[-2] #.resample('3T').last()  
prices_custom_low = data.history(context.future, 'low', 30, '1d').iloc[-2] #.resample('3T').last()  
prices_custom_close = data.history(context.future, 'close', 30, '1d').iloc[-2] #.resample('3T').last()  

yesterdays_high = data.history(context.future,'high', 20, '1d').iloc[-4]  
todays_high  = data.current(context.future,'high')  
yesterdays_low = data.history(context.future,'low',20,'1d').iloc[-4]  
todays_low     = data.current(context.future,'low')  


current_price = data.current(context.future,'price')  

current_position = context.portfolio.positions[security].amount

cash = context.portfolio.cash  

for context.future in context.portfolio.positions:  
    price = data.current(security, 'price')  
current_position = context.portfolio.positions[context.future].amount