Description:
When using named parameters (i.e. passing a dict as the second parameter to MySQLCursor.execute()), the module complains that the syntax of the statement is incorrect if a parameter is reused in the query.

How to repeat:
x = mysql.connection.connect(**db_kwargs)
y = x.cursor()

y.execute('SELECT * FROM example WHERE %(test)s = %(test)s', {'test':1})

Suggested fix:
File attached. (There's two places str.replace() is called with a third parameter of 1; simply remove that parameter in these two places.)

My Quick Fix

Attachment: patched_cursor.py (text/x-python), 26.10 KiB.

Oh yeah... here's the specific error response:

mysql.connector.errors.ProgrammingError: 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%(test)s' at line 1