该策略由聚宽用户分享，仅供学习交流使用。
原文网址：https://www.joinquant.com/post/13848

原文一般包含策略说明，如有疑问建议到原文和作者交流讨论。


原文策略源码如下：

import talib
from prettytable import PrettyTable 
import pandas 
import datetime
import time
from jqdata import *

def initialize(context):
    set_commission(PerTrade(buy_cost=0.0003, sell_cost=0.0013, min_cost=5))
    set_option('use_real_price', True)
    set_benchmark('000300.XSHG')
    log.set_level('order', 'error')
    log.set_level('history', 'error')
    g.buy_stock_count = 1
    g.hour = 9
    g.minute = 30
    
def handle_data(context, data):
    hour = context.current_dt.hour
    minute = context.current_dt.minute
    buy_stocks = []
    if hour == g.hour and minute == g.minute:
        buy_stocks = select_stocks(context,data)
        print '前一个交易日港资（北向资金）净买额最高的股票：\n'
        for stock in buy_stocks:
            print show_stock(stock)
        adjust_position(context, buy_stocks)
        print get_portfolio_info_text(context,buy_stocks)
        
def select_stocks(context,data):
    date = context.current_dt.strftime("%Y-%m-%d")
    today = datetime.datetime.strptime(date, "%Y-%m-%d").date()
    yesterday = shifttradingday(today ,shift = -1)
    print '前一个交易日:',yesterday 
    q = query(finance.STK_EL_TOP_ACTIVATE).filter(finance.STK_EL_TOP_ACTIVATE.day == yesterday )
    df = finance.run_query(q)
    df['net'] = df.buy - df.sell
    df = df.sort(columns = ['net'] , axis = 0, ascending = False)
    df = df[(df.link_id != 310003 ) & (df.link_id != 310004 )]
    stock_list = list(df['code'])
    # 过滤掉停牌的和ST的
    #stock_list = filter_paused_and_st_stock(stock_list)
    #过滤掉创业板
    #stock_list = filter_gem_stock(context, stock_list)
    # 过滤掉上市超过1年的
    #stock_list = filter_old_stock(context, stock_list)
    # 过滤掉现在涨停或者跌停的
    #stock_list = filter_limit_stock(context, stock_list)
    #stock_list = filter_limit_stock(context, data, stock_list)
    #选取前N只股票放入“目标股票池”
    stock_list = stock_list[:g.buy_stock_count]  
    return stock_list
        
def filter_paused_and_st_stock(stock_list):
    current_data = get_current_data()
    return [stock for stock in stock_list if not current_data[stock].paused 
    and not current_data[stock].is_st and 'ST' not in current_data[stock].
    name and '*' not in current_data[stock].name and '退' not in current_data[stock].name]
    
def filter_gem_stock(context, stock_list):
    return [stock for stock in stock_list  if stock[0:3] != '300']

def filter_old_stock(context, stock_list):
    tmpList = []
    for stock in stock_list :
        days_public=(context.current_dt.date() - get_security_info(stock).start_date).days
        # 上市未超过1年
        if  days_public < 365 :
            tmpList.append(stock)
    return tmpList
    
def filter_limit_stock(context, data, stock_list):
    tmpList = []
    current_data = get_current_data()
    for stock in stock_list:
        # 未涨停，也未跌停
        if (data[stock].low_limit < data[stock].close < data[stock].high_limit) and (current_data[stock].low_limit < data[stock].close < current_data[stock].high_limit):
            tmpList.append(stock)
    return tmpList
    
def adjust_position(context, buy_stocks):
    # 现持仓的股票，如果不在“目标池”中，且未涨停，就卖出
    if len(context.portfolio.positions)>0:
        last_prices = history(1, '1m', 'close', security_list=context.portfolio.positions.keys())
        for stock in context.portfolio.positions.keys():
            if stock not in buy_stocks :
                curr_data = get_current_data()
                if last_prices[stock][-1] < curr_data[stock].high_limit:
                    order_target_value(stock, 0)
    # 依次买入“目标池”中的股票            
    for stock in buy_stocks:
        position_count = len(context.portfolio.positions)
        if g.buy_stock_count > position_count:
            value = context.portfolio.cash / (g.buy_stock_count - position_count)
            if context.portfolio.positions[stock].total_amount == 0:
                order_target_value(stock, value)
                
def shifttradingday(date,shift):
    #获取N天前的交易日日期
    # 获取所有的交易日，返回一个包含所有交易日的 list,元素值为 datetime.date 类型.
    tradingday = get_all_trade_days()
    # 得到date之后shift天那一天在列表中的行标号 返回一个数
    shiftday_index = list(tradingday).index(date)+shift
    # 根据行号返回该日日期 为datetime.date类型
    return tradingday[shiftday_index]

def show_stock(stock):
    '''
    获取股票代码的显示信息    
    :param stock: 股票代码，例如: '603822.SH'
    :return: str，例如：'603822 嘉澳环保'
    '''
    return u"%s %s" % (stock[:6], get_security_info(stock).display_name)
    
def get_portfolio_info_text(context,new_stocks,op_sfs=[0]):
    # new_stocks是需要持仓的股票列表
    sub_str = ''
    table = PrettyTable(["仓号","股票", "持仓", "当前价", "盈亏率","持仓比"])  
    for sf_id in range(len(context.subportfolios)):
        cash = context.subportfolios[sf_id].cash
        p_value = context.subportfolios[sf_id].positions_value
        total_values = p_value +cash
        if sf_id in op_sfs:
            sf_id_str = str(sf_id) + ' *'
        else:
            sf_id_str = str(sf_id)
        for stock in context.subportfolios[sf_id].long_positions.keys():
            position = context.subportfolios[sf_id].long_positions[stock]
            if sf_id in op_sfs and stock in new_stocks:
                stock_str = show_stock(stock) + ' *'
            else:
                stock_str = show_stock(stock)
            stock_raite = (position.total_amount * position.price) / total_values * 100
            table.add_row([sf_id_str,
                stock_str,
                position.total_amount,
                position.price,
                "%.2f%%"%((position.price - position.avg_cost) / position.avg_cost * 100), 
                "%.2f%%"%(stock_raite)]
                )
        if sf_id < len(context.subportfolios) - 1:
            table.add_row(['----','---------------','-----','----','-----','-----'])
        sub_str += '[仓号: %d] [总值:%d] [持股数:%d] [仓位:%.2f%%] \n'%(sf_id,
            total_values,
            len(context.subportfolios[sf_id].long_positions)
            ,p_value*100/(cash+p_value))
    print '子仓详情:\n' + sub_str + str(table)
