python - psycopg2 executemany 与简单列表？

Question

我正在尝试将 psycopg2 executemany 用于简单的多插入，但我只能使用 dict 而不是“普通”值序列使其工作:

# given:
values = [1, 2, 3] ; cursor = conn.cursor()

# this raises TypeError: 'int' object does not support indexing:
cursor.executemany('INSERT INTO t (col_a) VALUES ( %s )', values)
# I also tried encapsulating my 'values' into a tuple/list but it gives another exception (TypeError: not all arguments converted during string formatting).

# while this is ok:
cursor.executemany('INSERT INTO t (col_a) VALUES ( %(value)s )', [  dict(value=v) for v in values ])

是否可以在不使用“命名”参数 (%(value)s) 的情况下给出一个“简单”的值列表/元组？

Answer 1

executemany 需要一系列序列，例如。列表列表:

[[v] for v in values]