SAGA algorithm (standalone)

run_processing_algorithm_standalone_saga.py

import sys

from qgis.core import (
     QgsApplication,
     QgsProcessingFeedback,
     QgsVectorLayer,
     QgsProperty
)

# On Linux, you need to prepare the environment with these variables:
# export PYTHONPATH=/docs/dev/qgis/QGIS/build_20190918/output/python/
# export LD_LIBRARY_PATH=/docs/dev/qgis/QGIS/build_20190918/output/lib/

# See https://gis.stackexchange.com/a/155852/4972 for details about the prefix
# Hint: print(QgsApplication.showSettings())
QgsApplication.setPrefixPath('/docs/dev/qgis/QGIS/build_20190918/output', True)
qgs = QgsApplication([], False)
qgs.initQgis()

# Append the path where processing plugin can be found
sys.path.append('/docs/dev/qgis/QGIS/build_20190918/output/python/plugins')

import processing
from processing.core.Processing import Processing
Processing.initialize()

params = {'SHAPES':'/tmp/puntos.shp|layername=puntos',
          'FIELD':'PT_NUM_A',
          'TARGET_USER_XMIN TARGET_USER_XMAX TARGET_USER_YMIN TARGET_USER_YMAX':None,
          'TARGET_USER_SIZE':10,
          'TARGET_USER_FITS':0,
          'TARGET_OUT_GRID':'TEMPORARY_OUTPUT'}
res = processing.run("saga:triangulation", params)

print(res)