如何將List轉換為datetime.date對象？

Question

我正在嘗試從數據庫中提取數據並以格式正確的形式顯示它。

當db給我日期時，我正在嘗試以字符串'Day / Mon / Year'的形式顯示日期。 我已經使用以下代碼來執行此操作，但是這使我出錯。

如何將列表轉換為date.time對象？

import psycopg2
from datetime import datetime
db = psycopg2.connect("dbname=news")
if db:
  print("DB CONNECTED")
c = db.cursor()
c.execute("select day from (select date(time) as day, count(id) as errors from log where status != '200 OK' group by day order by errors desc limit 1) as seq")
t = c.fetchall()
res = datetime.strftime(t,'%b %d, %Y')
print(res)
db.close()


TypeError: descriptor 'strftime' requires a 'datetime.date' object but received a 'list'

Answer 1

根據我的經驗，您需要遍歷該列表。 也許這會奏效，還沒有測試過，但這就是我做的方式。

import psycopg2
from datetime import datetime
db = psycopg2.connect("dbname=news")
if db:
  print("DB CONNECTED")
c = db.cursor()
c.execute("select day from (select date(time) as day, count(id) as errors from log where status != '200 OK' group by day order by errors desc limit 1) as seq")
t = c.fetchall()
c.close()
db.close()
for dates in t:
    print(datetime.strftime(dates, '%b %d, %Y'))