日复一日emerge

如题，比较实用，可以从google finance抓取股价，监测买入和卖出价格。顺便曝光一下我的持仓和操作手法。其中的float()不接受有千分位的字符串，在网上蠢蠢地找了一下午也没找到办法，结果到邮件列表一问就有人（chuan）帮忙给出答案了。

num = '1,000.00'

num = float(num.replace(',', ''))

又有人（pansz）说：

#/bin/env python

import sys
import time, datetime
import re, urllib

def get_quote(symbol):
    base_url = 'http://finance.google.com/finance?q='
    content = urllib.urlopen(base_url + symbol).read().decode('utf-8')
    find_quote = re.search(r'\<span\sid="ref_\d+.*">(.+)<', content)
    find_range = re.search(r'\<td\sclass="val">(.+)\n',content)
    if find_quote:
        quote = find_quote.group(1)
        range_val = find_range.group(1)
    else:
        quote = 'no quote available for: %s' % symbol
    try:
        return float(quote.replace(',','')),\
          float(range_val.split('-')[0].replace(',','')),\
             float(range_val.split('-')[1].replace(',',''))
    except:
        return float(quote.replace(',','')),0,0

def main():
    #print get_quote('ibm') #168.28
    closetime = datetime.datetime(
            datetime.datetime.now().year,
            datetime.datetime.now().month,
            datetime.datetime.now().day,15,5)
    while True :
        companyfile = open('companys')
        print '  symbol  |current|  min  |  max  |  buy  |  sell |flag'
        for line in companyfile:
            symbol,middle_price_str = line.split(',')
            middle_price = float(middle_price_str)
            current_price,min_price,max_price = get_quote(symbol)
            operation = '='
            buy_price = round(middle_price/1.05,2)
            sell_price = round(middle_price*1.05,2)
            if min_price <= buy_price and min_price > 0:
                operation = "+"
                #print '%s'%'\a',
                sys.stdout.write('\a')
            if max_price >= sell_price:
                operation += "-"
                sys.stdout.write('\a')
            print '%s|%*s|%*s|%*s|%*s|%*s|%s'%(
                    symbol,7,current_price,7,min_price,
                    7,max_price,7,buy_price,7,sell_price,operation)
        if datetime.datetime.now() >= closetime:
            break
        else:
            time.sleep(100)

        '''Output-->
  symbol  |current|  min  |  max  |  buy  |  sell |flag
SHA:000001|2473.41|2456.18|2483.76|2285.71| 2520.0|=
SHA:600036|  12.35|  12.25|  12.55|  11.81|  13.02|=
SHA:600221|   6.19|   6.09|   6.32|    5.8|   6.39|=
SHA:600360|   4.96|   4.88|   4.98|   4.62|   5.09|=
SHA:600362|  28.43|   28.2|  29.08|  27.65|  30.48|=
SHA:600900|   6.52|   6.46|   6.59|   6.02|   6.64|=
SHE:000709|   3.87|   3.83|   3.92|   3.66|   4.03|=
SHE:000868|   9.63|   9.56|   9.75|   9.05|   9.97|=
SHE:000983|  20.01|  19.63|   20.2|  18.93|  20.87|=
        '''

if __name__ == "__main__":
    main()

很粗糙，还在持续改进中。用到的数据文件companys的格式如下，这几只股票都是我目前持仓的：

SHA:000001,2400
SHA:600036,11.81
SHA:600221,6.09
SHA:600360,4.85
SHA:600362,27.65
SHA:600900,6.32
SHE:000709,3.84
SHE:000868,9.5
SHE:000983,18.93