Error 'Invalid values[1][0]: list_value' when i try append numbers to a list in Python and send that list to a Google Sheets column

In your script, values = ((para_enviar_conjunto),) is ([[21], [79]],). I thought that this might be the reason of your issue. So in this case, how about the following modification?

From:

value_range_body = {
    'majorDimension': 'ROWS',
    'values': values
}

To:

value_range_body = {
    'majorDimension': 'ROWS',
    'values': para_enviar_conjunto
}
  • In this case, you can remove values = ((para_enviar_conjunto),).