Hi I just started today. I wrote a simple algorithm to start with Quantopian but seems there is some error. Where did I go wrong?

def initialize(context):  
 schedule_function(rebalance,date_rules.week_start(),time_rules.market_open(hours=1,minutes=0))

def getStocks(context):  
    number_of_stocks = 10  
    fund = get_fundamentals(  
        query(  
            fundamentals.asset_classification.sic,  
            fundamentals.valuation_ratios.pe_ratio,  
            fundamentals.income_statement.gross_profit  
        )  
                .filter(fundamentals.valuation_ratios.book_value_per_share<1.8  
            # put your filters here  
        )  
        .filter(fundamentals.valuation_ratios.pe_ratio<18  
        )  
        .filter(fundamentals.earnings_report.basic_eps>0)  
        .filter(fundamentals.income_statement.gross_profit>0)  
        .filter(fundamentals.operation_ratios.quick_ratio>1)  
        .filter(fundamentals.operation_ratios.current_ratio>2)  
        .order_by(  
            # sort your query  
            fundamentals.valuation.market_cap.DESC()  
        )  
        .limit(number_of_stocks)  
    )  
    context.fund = fund  
    context.stocks = fund.columns.values

def rebalance(context,data):  
    current_stock = context.portfolio.positions  
    for stock in current_stock:  
        if stock not in context.fund:  
            order_target_percent(stock,0)  
    new_weight = get_weight(context,context.stocks)

    for stock in context.stocks:  
        if stock not in current_stock:  
            order_target_percent(stock, new_weight)  
def get_weight(context, stock):  
    l = len(stock)  
    if l == 0:  
        return 0  
    else:  
        return 0.95/l  
def handle_data(context,data):  
    """  
    Called every minute.  
    """  
    pass

Please help! Thank you!