Python:检索受SQLDELETE查询影响的行数

看起来很容易检索SELECT带有SQL查询的ed 行数

cursor.execute("SELECT COUNT(*) from ...")
result=cursor.fetchone()

但是我应该如何通过DELETE查询检索行数？

"受影响的行"功能通过cursor.rowcount以下方式实现:

cursor.execute("DELETE from ...")
result = cursor.rowcount

演示:

In [1]: import sqlite3

In [2]: db = sqlite3.connect(":memory:")

In [3]: cursor = db.cursor()

In [4]: cursor.execute("create table test(i)")
Out[4]: 

In [5]: cursor.execute("insert into test(i) values (1)")
Out[5]: 

In [6]: cursor.execute("insert into test(i) values (2)")
Out[6]: 

In [7]: cursor.execute("insert into test(i) values (3)")
Out[7]: 

In [8]: cursor.execute("delete from test where i >= 2")
Out[8]: 

In [9]: cursor.rowcount
Out[9]: 2