插入文件名Postgres的表

Question

我有以下代码插入文件名Postgres的表称为“日志”

c = engine.connect() 
conn = c.connection 
cur = conn.cursor() 

cur.execute("SELECT filename from logs") 
rows1 = cur.fetchall() 
rows1 = [x[0] for x in rows1] 

for root, directories, filenames in os.walk(path): 
    for filename in filenames: 
     fname = os.path.join(root,filename) 
     if os.path.isfile(fname) and fname[-4:] == '.log': 
      if fname not in rows1: 
      print fname 
      cur.execute(""" INSERT INTO logs(filename) VALUES (%(fname)s)""") 
      conn.commit() 

我收到错误

ProgrammingError: syntax error at or near "%" 
LINE 1: INSERT INTO logs(filename) VALUES (%(fname)s) 

我可以知道在哪里我做错了？

Answer 1

您尚未将任何参数传递给查询，因此不会进行替换;适配器会将字符串(%(fname)s)传递给Postgres。

cur.execute("""INSERT INTO logs(filename) VALUES (%(fname)s)""", {'fname': fname'})