Mastering GUI Programming with Python

Implementing read capabilities

To create instances of our model to display data in a view, we need to implement three methods:

• rowCount(), which must return the total number of rows in the table
• columnCount(), which must return the total number of columns in the table
• data(), which is used to request data from the model

rowCount() and columnCount() are easy enough in this case:

  def rowCount(self, parent):    return len(self._data)  def columnCount(self, parent):    return len(self._headers)

The row count is just the length of the _data property, and the column count can be had by taking the length of the _headers property. Both functions are required to take a parent argument, but in this case, it is not used as it refers to the parent node, ...