import os, sys, datetime, glob, re, pprint
from qgis.core import *

from qgis.analysis import QgsNativeAlgorithms

sys.path.append(r'c:/SW/QGIS3.6/apps/qgis/python/plugins')

#-------------------------------------------------------------
#  start QGIS processing application

QgsApplication.setPrefixPath(r'C:/SW/QGIS3.6/apps/qgis', True)
print(QgsApplication.prefixPath())
qgs = QgsApplication([], False)
qgs.initQgis()

from processing.core.Processing import Processing
Processing.initialize()
QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
#-------------------------------------------------------------


# folder = r'd:1_Projects'
# files = glob.glob(folder + '/**/BUDOVY_P.shp', recursive=True)

out = r''
file = r'd:1_ProjectsBUDOVY_P.shp'


layer = QgsVectorLayer(file, 'tmp', 'ogr')
print(layer.isValid())
qgs.exitQgis()

C:/SW/QGIS3.6/apps/qgis
False

C:SWQGIS3.6appsqgispython
C:SWQGIS3.6appsPython37
C:SWQGIS3.6appsPython37Lib
C:SWQGIS3.6appsPython37Libsite-packages
C:SWQGIS3.6bin
C:SWQGIS3.6include
C:SWQGIS3.6appsqgisbin
C:SWQGIS3.6appsqgispythonplugins
C:SWQGIS3.6appsgrassgrass-7.6.0
C:SWQGIS3.6appsQt5bin

C:SWQGIS3.6appsqgisbin
C:SWQGIS3.6bin
C:SWQGIS3.6appsPython37Scripts