Zooming to specific layer using PyQGIS

Question

Using PyQGIS with QGIS 3, I am trying to zoom in a specific layer but I have not succeeded. He tried several answers but it doesn't work for me. Either it gives me a mistake or it does nothing to me

This is my code:

from qgis.utils import *
from qgis.PyQt.QtCore import *
from qgis.PyQt import QtGui
import os

fn8=rutas[2]
fn8=fn8.rstrip()
fn8=fn8+"\Datos Puntos Qgis.shp"
fn8=fn8.rstrip()

layer6 = QgsVectorLayer(fn8, 'ObrasCiviles', 'ogr')

QgsProject.instance().addMapLayer(layer6)#Lo añado al mapa de capas
QgsProject.instance().layerTreeRoot().findLayer(layer6.id()).setExpanded(False)

layer6 = iface.activeLayer ()

canvas = iface.mapCanvas ()
canvas = qgis.utils.iface.mapCanvas ()
canvas.zoomToSelected (layer6)
canvas.refresh ()

Answer 1

I don't see you actually selecting any data within the layer. If selection isn't important to you, could try something like:

canvas = iface.mapCanvas()
layer6.selectAll()
canvas.zoomToSelected()
layer6.removeSelection()
canvas.refresh()

Otherwise you could get the layer extents and then zoom to the bounding box:

---

canvas = iface.mapCanvas()
extent = layer6.extent()
canvas.setExtent(extent)
canvas.refresh()

You are right. I also tried but nothing happens