select_features_for_scripting.py

# coding: utf-8
from PyQt4.QtGui import QMessageBox
from qgis.core import QgsRectangle
from qgis.gui import QgsMapToolEmitPoint
from qgis.utils import iface

canvas = iface.mapCanvas()
main_window = iface.mainWindow()
clickTool = QgsMapToolEmitPoint(canvas)


def my_custom_function(features):
    print(features)


def handle_mouse_down(point, button):
    """"Manage selection when clicking on the canevas."""
    layers = canvas.layers()
    vl_to_query = [l for l in layers if l.name() != u'my_layer_name'][0]
    w = canvas.mapUnitsPerPixel() * 3
    rect = QgsRectangle(
        point.x() - w,
        point.y() - w,
        point.x() + w,
        point.y() + w
    )
    l_rect = canvas.mapSettings().mapToLayerCoordinates(vl_to_query, rect)
    vl_to_query.select(l_rect, False)
    feats = vl_to_query.selectedFeatures()
    vl_to_query.removeSelection()
    clickTool.canvasClicked.disconnect(handle_mouse_down)
    # Do operations using selected features. Here we run a function
    my_custom_function(feats)
    # We change the default tool to pan tool
    # after the function execution on selected features
    iface.actionPan().trigger()

clickTool.canvasClicked.connect(handle_mouse_down)

QMessageBox.information(
    main_window,
    "User dialog info",
    u"Thanks to select a geographic feature"
)
canvas.setMapTool(clickTool)

When am trying to use this code getting an error like "AttributeError: class instance has no attribute 'x' ".
Can you tell me why is this happening
Thank you