Le portail francophone de la géomatique

from qgis.core import QgsProject
from PyQt4.QtCore import QFileInfo
import os
fichier = 'D:/WKSP/1_TRAVAUX/180329_EOLIENS_RAPACES/180329_EOLIENS_RAPACES.qgs'
if os.path.isfile(fichier):
    print("le fichier projet existe")
    fichier = QFileInfo(fichier)
    projet = QgsProject.instance()
    projet.read(fichier)

from qgis.utils import iface

def getCompositionByName(name) :
    '''
    récupère le composeur dont le nom est name
    '''
    for composer_view in iface.activeComposers() :
            print composer_view.composerWindow().windowTitle()
            if composer_view.composerWindow().windowTitle() == name :
                myComposition = composer_view.composition()
                return(myComposition)

getCompositionByName("Composeur 1")

qgis --code mon_fichier.py

import os
from qgis.core import QgsProject
from qgis.gui import QgsMapCanvas, QgsLayerTreeMapCanvasBridge
from qgis.core.contextmanagers import qgisapp
from PyQt4.QtCore import QFileInfo

########CONFIGURATION###########
repertoireTravail = 'C:/GEOLIS_2/'
##############################

project_path =  repertoireTravail + '/atlas.qgs'
canvas = QgsMapCanvas(None)  # will reparent it to widget via layout

# Load our project
bridge = QgsLayerTreeMapCanvasBridge(QgsProject.instance().layerTreeRoot(), canvas)
QgsProject.instance().read(QFileInfo(project_path))

# Load the composer
composerView = qgis.utils.iface.activeComposers()[0]
composition = composerView.composition()
atlas = composition.atlasComposition()
composition.setAtlasMode(QgsComposition.ExportAtlas)
atlas.beginRender()
for i in range(0,atlas.numFeatures()):
    atlas.prepareForFeature(i)
    composition.exportAsPDF('C:/GEOLIS_2/report_5'+str(i)+'_carte.pdf')
atlas.endRender()

 composerView = iface.activeComposers()[0]

from qgis.core import QgsApplication, QgsProject, QgsLayoutExporter
import os
from qgis.core import QgsApplication, QgsProject, QgsProject
from qgis.core import QgsProject
from qgis.gui import QgsMapCanvas, QgsLayerTreeMapCanvasBridge
from qgis.utils import iface
from qgis.core.contextmanagers import qgisapp
from PyQt5.QtCore import QFileInfo
import sys

def export_atlas(qgs_project_path, layout_name, outputs_folder):

     # Open existing project
     project = QgsProject.instance()
     project.read(qgs_project_path)

     # Open prepared layout that as atlas enabled and set
     layout = project.layoutManager().layoutByName(layout_name)

     # Start atlas iterator
     atlas = layout.atlas()
     if atlas.beginRender():
         while atlas.next():
             exporter = QgsLayoutExporter(layout)
             settings = QgsLayoutExporter.ImageExportSettings()
             filename =  atlas.currentFilename()+'_.png' #f'atlas.currentFilename().png'
             filename_path = os.path.join(outputs_folder, filename)
             print(f'Export '+atlas.currentFilename())
             exporter.exportToImage(filename_path, settings)
             print(f'finished')
             atlas.endRender()
     else:
        print('WARNING - No atlas features available for export!')


def main():
     # Start a QGIS application without GUI
     qgs = QgsApplication([], False)
     qgs.initQgis()

      #Chemon des projets qgz, chemin du répertoire d'export et nom du composeur 
     project_path = sys.argv[1]
     output_folder = 'O:/RESTITUTION/'
     layout_name = 'page'

     export_atlas(project_path, layout_name, output_folder)

     # Close the QGIS application
     qgs.exitQgis()

if __name__ == "__main__":
 main()

@echo off
call "C:\Program Files\QGIS 3.16\bin\o4w_env.bat"
call qt5_env.bat
call py3_env.bat
path %OSGEO4W_ROOT%\apps\qgis-ltr\bin;%PATH%
set QGIS_PREFIX_PATH=%OSGEO4W_ROOT:\=/%/apps/qgis-ltr
set GDAL_FILENAME_IS_UTF8=YES
rem Set VSI cache to be used as buffer, see #6448
set VSI_CACHE=TRUE
set VSI_CACHE_SIZE=1000000
set QT_PLUGIN_PATH=%OSGEO4W_ROOT%\apps\qgis-ltr\qtplugins;%OSGEO4W_ROOT%\apps\qt5\plugins

SET PYTHONPATH=C:\PROGRA~1\QGIS3~1.16\apps\Python37;C:\PROGRA~1\QGIS3~1.16\apps\Python37\Scripts;C:\Program Files\QGIS 3.16\apps\qgis-ltr\python
SET QT_QPA_PLATFORM_PLUGIN_PATH=C:\PROGRA~1\QGIS3~1.16\apps\Qt5\plugins
SET PATH=%PATH%;C:\PROGRA~1\QGIS3~1.16\apps\Qt5\bin;C:\PROGRA~1\QGIS3~1.16\apps\Python37\Lib\site-packages

@echo on
REM on boucle sur les projet QGIS
for  %%i in (*.qgz) do (
echo %%i
python3 exportpage.py %%i
)

pause