简单的问题。 如何转换python列表以在sqlite查询中成功使用它

Question

I am trying to put test1 list into db query where :count is. Problem is it should be working fine as if I were to put WHERE id in (1, 2), but using my code it is not. Fix needed, will appreciate any teaching. I am new to programming.

from cs50 import SQL

db = SQL("sqlite:///database.db")
test2 = [1, 2]
test3 = str(test2).strip('[]')
print(test3)
dbcounted = db.execute('SELECT * FROM products WHERE id in (:count);', count = test3)
print(dbcounted)

Answer 1

Going off the CS50 documentation it looks like it expects an array instead of a string. So this gives you two options:

Assemble a full string and pass it:

from cs50 import SQL

db = SQL("sqlite:///database.db")
test2 = [1, 2]
ex_str = 'SELECT * FROM products WHERE id in (' + str(test2).strip('[]') + ');'
print(ex_str)
dbcounted = db.execute(ex_str)
print(dbcounted)

Or you can pass count as an array as expected by the function call:

from cs50 import SQL

db = SQL("sqlite:///database.db")
test2 = [1, 2]
dbcounted = db.execute('SELECT * FROM products WHERE id in (:count);', count = test2)
print(dbcounted)