SQL IN operator using pyodbc and SQL Server

Question

I'm using pyodbc to query to an SQL Server database

import datetime
import pyodbc    
conn = pyodbc.connect("Driver={SQL Server};Server='dbserver',Database='db',
                       TrustedConnection=Yes")
cursor = conn.cursor()
ratings = ("PG-13", "PG", "G")
st_dt = datetime(2010, 1, 1)
end_dt = datetime(2010, 12, 31)
cursor.execute("""Select title, director, producer From movies 
                Where rating In ? And release_dt Between ? And ?""", 
                ratings, str(st_dt), str(end_dt))

but am receiving the error below. Does the tuple parameter need to be handled in a different way? Is there a better way to structure this query?

('42000', "[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]Line 9: 
  Incorrect syntax near '@P1'. (170) (SQLExecDirectW); 
  [42000] [Microsoft][ODBC SQL Server Driver][SQL Server]
  Statement(s) could not be prepared. (8180)")

UPDATE:

I was able to get this query to work using the string formatting operator, which isn't ideal as it introduces security concerns.

import datetime
import pyodbc    
conn = pyodbc.connect("Driver={SQL Server};Server='dbserver',Database='db',
                       TrustedConnection=Yes")
cursor = conn.cursor()
ratings = ("PG-13", "PG", "G")
st_dt = datetime(2010, 1, 1)
end_dt = datetime(2010, 12, 31)
cursor.execute("""Select title, director, producer From movies 
                Where rating In %s And release_dt Between '%s' And '%s'""" % 
                (ratings, st_dt, end_dt))

Answer 1

To expand on Larry's second option - dynamically creating a parameterized string, I used the following successfully:

placeholders = ",".join("?" * len(code_list))
sql = "delete from dbo.Results where RESULT_ID = ? AND CODE IN (%s)" % placeholders
params = [result_id]
params.extend(code_list)
cursor.execute(sql, params)

Gives the following SQL with the appropriate parameters:

delete from dbo.Results where RESULT_ID = ? AND CODE IN (?,?,?)