How to Properly Use cursor.executemany with a Python List in SQLite

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Understanding the Problem

You might have encountered the following code when trying to insert a list of random numbers into your SQLite database:

[[See Video to Reveal this Text or Code Snippet]]

However, this code throws the error indicating that the parameters are of unsupported type. The root of the problem lies in the way data is passed to the executemany method.

The Solution: Using Tuples

Why Tuples?

Correct Code Example

To fix the issue and properly insert the values, you need to transform your list of numbers into a list of tuples. Here’s how you can do this:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Code

List Comprehension: The expression [(n,) for n in random_numbers] creates a list of tuples, where each number in random_numbers is wrapped in its own tuple.

Example Walkthrough

Let’s go through a full example of how this works in practice:

Setup the Database: Ensure your table is ready to accept data.

[[See Video to Reveal this Text or Code Snippet]]

Insert Data with Python: Use the following Python code to insert your numbers:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

The next time you attempt to insert multiple rows of data, remember to format your input correctly, and enjoy the benefits of efficient database operations in Python!