小编Jas*_*son的帖子

这是我追求的功能: -

http://docs.python.org/3/library/stdtypes.html#int.to_bytes

我需要大的字节顺序支持.

我有两张桌子: -

manu_table
product_id, manufacturer
1, ford
2, ford
3, toyota

product_table
product_id, score
1, 80
2, 60
3, 40

我想在摘要表中为每个制造商存储最高得分product_id: -

summary_table
manufacturer, max_score
ford,   1
toyota, 3

到目前为止,我有: -

UPDATE summary_table st
SET max_score = (
                 SELECT product_id 
                 FROM (
                       SELECT manufacturer, product_id, max(score) as ms 
                       FROM manu_table 
                       LEFT JOIN product_table USING (product_id) 
                       group by product_id) t)
WHERE st.manufacturer = manu_table.manufacturer;

有麻烦...所有的帮助都非常感激.

cur.execute("SELECT \
                title, \
                body, \
                date \ # This pgsql type is date
             FROM \
                table \
             WHERE id = '%s';", id)

response = cur.fetchall()

print response

作为一个例子,这给了我: -

[('sample title', 'sample body', datetime.date(2012, 8, 5))]

哪个不能传递给像json.dumps这样的东西所以我必须这样做: -

processed = []

for row in response:
    processed.append({'title' : row[0], 
                      'body' : row[1], 
                      'date' : str(row[2])
                     })

感觉形状不好,有没有人知道更好的处理方式？

这是有问题的代码（一个非常简单的爬虫），该文件是一个 url 列表，通常大于 1000。

import sys, gevent
from gevent import monkey
from gevent.pool import Pool
import httplib, socket
from urlparse import urlparse
from time import time

pool = Pool(100)

monkey.patch_all(thread=False)

count = 0
size = 0
failures = 0

global_timeout = 5
socket.setdefaulttimeout(global_timeout)

def process(ourl, mode = 'GET'):
    global size, failures, global_timeout, count
    try:
        url = urlparse(ourl)
        start = time()
        conn = httplib.HTTPConnection(url.netloc, timeout = global_timeout)
        conn.request(mode, ourl)
        res = conn.getresponse()
        req = res.read()
        end = time()
        bytes = len(req) …