Loading WMS layer into QGIS Project through Python standalone script

Question

I can load WMS layers by coding on QGIS Python console, those are the codelines:

# Google Satelite URL wms 
url = 'type=xyz&url=http%3A//mt1.google.com/vt/lyrs%3Dy%26x%3D%7Bx%7D%26y%3D%7By%7D%26z%3D%7Bz%7D'
# Constructing layer thoughout wms url
layer = QgsRasterLayer(url, 'Google Satelite', 'wms')
# Add this layer to the current project
QgsProject.instance().addMapLayer(layer)

I use QGIS 3.16 in a Ubuntu Linux VM. When I type these line of code on QGIS console this is what I get:

The problem occur when I try execute the same lines in a standalone script (using PyCharm IDE) and after load WMS layer I save a copy of this project, those are the lines i run in PyCharm standalone script:

from qgis.core import QgsApplication, QgsProject
import requests

# QGIS instalation folder path
QgsApplication.setPrefixPath('/usr/qgis', True)

# QGIS reference
qgs = QgsApplication([], True)

# Initiating QGIS
qgs.initQgis()

# Creating a variable to my qgis project
project = QgsProject.instance()

# Read a specific project
### DOWNLOAD https://drive.google.com/file/d/1Pqk5W3y47Mt4rjlN1QzGoarBGGl6B3og/view?usp=sharing
project.read('path/to/qgisproject/with/0001_tester/layout/0001.qgz')

# google satelite image WMS url
# class googleWMS:
url = "http://mt1.google.com/vt/lyrs=y&x={x}&y={y}&z={z}"
uri = "type=xyz&url="+requests.utils.quote(url)

# Create a layer from WMS url
tms_layer = QgsRasterLayer(uri, "Google Satelite", 'wms')

# Add this layer into project
QgsProject.instance().addMapLayer(tms_layer)

# Save the project in another location
QgsProject.instance().write('path/to/qgisproject.qgz')

The script can load the layer into qgis project and save the file, but the WMS layer is broken... No image is loaded to workspace.

Answer 1

As mentioned in the comments, if you run QgsProviderRegistry.instance().providerList() in the PyCharm version, you will be able to notice that the provider wms is not loaded. This happens because the specified path is not correct and the Standalone version running under PyCharm does not have access to wms.

To fix this, just run in QGIS Python Console:

QgsApplication.showSettings()

Then an associated path called QGIS_PREFIX_PATH will appear. Finally, just replace in the PyCharm code the qgis_prefix for the path indicated above.

qgs = QgsApplication([], True)
qgis_prefix = "YOUR PATH"
qgs.setPrefixPath(qgis_prefix, True)
qgs.initQgis()