Python unixtime 比较

Question

我在日期比较方面有点问题。函数检查数据库的域和时间，如果没有找到域，则执行代码并插入数据库。如果域和日期存在，则检查日期是否早于 24 小时并执行函数。

数据库条目如下所示：

domain          inform_date
pl23.domain.lt  1426690221

函数是：

### Inform function
def information( domain ):
  inform_timelimit = now - (inform_time*3600)
  cur.execute("SELECT inform_date FROM php_inform_date WHERE `domain` = %s", (domain))
  time_send = cur.fetchone()
  if time_send == None:
    cur.execute("REPLACE INTO php_inform_date VALUES (%s, %s)", (domain, now))
    (...)
  if inform_timelimit > time_send[0]:
    cur.execute("REPLACE INTO php_inform_date VALUES (%s, %s)", (domain, now))
    (...)

可变时间限制是 unixtime：

now = int(time.time())
inform_timelimit = now - (24*3600)

找到域时出现的错误：

Traceback (most recent call last):
  File "/opt/php-secure-sendmail/secure_sendmail.py", line 84, in <module>
    information(domain)
  File "/opt/php-secure-sendmail/secure_sendmail.py", line 41, in information
    if inform_timelimit > time_send[0]:
TypeError: 'NoneType' object is unsubscriptable

PS。抱歉我的英语不好 ;)

Answer 1

我找到了解决方案。只是改变逻辑：

### Inform function
def information( domain ):
  cur.execute("SELECT inform_date FROM php_inform_date WHERE `domain` = %s", (domain))
  time_send = cur.fetchone()
  ### if no information about time in DB do action:
  if time_send == None:
    (.....)
  else:
    ### if found entry, then check 24 hour limit / inform_time - includet from config file (24 hours / or can change)
    inform_timelimit = now - time_send[0]
    if inform_timelimit > inform_time:
      (.....)

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