與Psycopg2

Question

我想在我的查詢使用Psycopg2一個Postgres數據庫使用Python datetime對象，但我有以下錯誤日期時間語法錯誤：

代碼：

# createdat is a datetime variable I used before 
print(type(createdat)) 

q = """ 
    select created_at 
    from mytable t 
    and t.created_at < %(createdat)s 
    """ % { 
     'createdat' : createdat 
     } 

read.execute(q) 

返回：

<type 'datetime.datetime'> 

Traceback (most recent call last): 
    File "import.py", line 346, in <module> 
    read.execute(q) 
    File "/usr/lib/python2.7/dist-packages/psycopg2/extras.py", line 120, in execute 
    return super(DictCursor, self).execute(query, vars) 
psycopg2.ProgrammingError: syntax error at or near "20" 
LINE 6:   and created_at < 2015-05-05 20:22:22 

任何想法？在此先感謝

Answer 1

q = """ 
select created_at 
from mytable t 
and t.created_at < %(createdat)s 
""" 

read.execute(q, {'createdat' : createdat}) 

嘗試這種方式，Psycopg2本身將盡一切