python3 mysql连接器模块引发异常-ValueError：无法处理参数

Question

I am trying to get past this error that is haunting me. I built a simple script to populate a single column database.

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  passwd="password",
  database="mydatabase"
) 
mycursor = mydb.cursor()

mycursor.execute("CREATE TABLE IF NOT EXISTS data(pass_word VARCHAR(20))")

val = 'test'
sql = "INSERT INTO data(pass_word) VALUES '%s'"
mycursor.execute(sql, (val))
mydb.commit() 

It creates the table no problem, so I know the connector is working. But it refuses to insert the val into pass_word.

It throws the following exception

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Traceback (most recent call last):
  File "sql-try.py", line 19, in <module>
    mycursor.execute(sql, (val))
  File "/usr/local/lib/python3.6/dist-packages/mysql/connector/cursor_cext.py", line 248, in execute
    prepared = self._cnx.prepare_for_mysql(params)
  File "/usr/local/lib/python3.6/dist-packages/mysql/connector/connection_cext.py", line 538, in prepare_for_mysql
    raise ValueError("Could not process parameters")
ValueError: Could not process parameters

Answer 1

I think the issue was that my table only had one column, so when I was passing the val, val itself needed to be a tuple. Changing it to (sql, (val,)) did not address the issue. When I created a table with more than one column, the problem went away.

mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  passwd="password",
  database="mydatabase"
)
mycursor = mydb.cursor()
myname = 'jimmy'
password = 'grizwald'

mycursor.execute("CREATE TABLE IF NOT EXISTS data3(my_name VARCHAR(20), pass_word VARCHAR(20))")

val = (myname, password )
sql = "INSERT INTO data3(my_name, pass_word) VALUES (%s, %s)"
mycursor.execute(sql, val)
mydb.commit()