Python - QGIS - Fix geometries

fix-geometries.py

"""
Small script to fix geometries of the first file argument
using the native QGIS processing algorithm. You may need
to adjust the path to you installation.
"""

import sys
sys.path.append('/usr/share/qgis/python/plugins')

from processing.core.Processing import Processing
import processing
from qgis.core import (
    QgsApplication,
    QgsProcessingFeedback,
    QgsVectorLayer
)
from qgis.analysis import QgsNativeAlgorithms


print("Initializing QGIS...")
qgs = QgsApplication([], False)
qgs.initQgis()
Processing.initialize()
QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())


# Getting the file paths
in_file = sys.argv[1]
out_file = sys.argv[2]

# Running the algorithm
params = {
    'INPUT': QgsVectorLayer(in_file, 'layer1', 'ogr'),
    'OUTPUT': out_file
}
feedback = QgsProcessingFeedback()

print("Running the fix geometries algorithm...")
res = processing.run("native:fixgeometries", params, feedback=feedback)

print("Done!")