What I am trying to do is create a single line of code to execute sql that inserts data into whichever table the user decides. Each table will have a varying number of columns therefore I cannot specify how many ?s to put in the brackets. If anyone can find a solution, please share it with me as I am stuck as of now.

self.conn.execute('INSERT INTO '   self.table   ' VALUES (?)', (self.data))

self.data is a list containing 3 items as of now but may change if the table is changed.

CodePudding user response：

You could dynamically generate a string of comma-separated ? based on the length of self.data, e.g.:

values = ", ".join("?" * len(self.data))
self.conn.execute('INSERT INTO '   self.table   ' VALUES ('   values   ')', (self.data))

If you have Python 3.6 or later, using a formatted string with execute() would be more Pythonic and compact:

self.conn.execute(f'INSERT INTO {self.table} VALUES ({values})', (self.data))