passing a list\set as an argument failing

• asyncpg version:19.0
• PostgreSQL version:12
• Do you use a PostgreSQL SaaS? If so, which? Can you reproduce
  the issue with a local PostgreSQL install?:N\A
• Python version:3.7.5
• Platform:Windows
• Do you use pgbouncer?:No
• Did you install asyncpg with pip?:Yes
• If you built asyncpg locally, which version of Cython did you use?:N\A
• Can the issue be reproduced under both asyncio and
  uvloop?:

Similar to issue #94

I am trying to set up a query using ($1) and passing an argument. I am running into an issue when trying to pass a list of sets. Is there a way to format this query like the last example?

query = [(0,0), (1,1), (2,2)]

works:    await conn.fetch('SELECT * FROM table WHERE (a, b) IN ((0,0), (1,1), (2,2))')

works:    await conn.fetch('SELECT * FROM table WHERE (a, b) IN ' + str(tuple(query)))

fails:    await conn.fetch('SELECT * FROM table WHERE (a, b) IN ($1)', '((0,0), (1,1), (2,2))')

fails:    await conn.fetch('SELECT * FROM table WHERE (a, b) IN ($1)', str(tuple(query)))

works:    await conn.fetch('INSERT INTO table (a, b, c, d) VALUES ($1, $2, $3, $4)', a, b, c, d)

Thank you

从此 issue 中的复现示例开始，并将其与 issue #94 进行比较，重点关注 asyncpg 如何处理在 PostgreSQL 行值 IN 表达式中使用的参数。在所述的 Python、PostgreSQL 和 Windows 设置上复现可工作的查询和失败的查询；当已确定或记录受支持的行为和所需的参数形式时，即视为完成。