arcpyloader
Loads the correct arcgisscripting DLL for ArcPy to function when relaunched from within another Python scripts.
Under certain circumstances, importing ArcPy while using Python multiprocessing will result in an error like:
DLL load failed: %1 is not a valid Win32 application.
This is caused by the sub-process attempting to load the wrong version of the arcgisscripting DLL (e.g. loading the x86 version in a x64 environment).
This mainly occurs in ArcGIS Desktop with background processing installed.
The arcpyloader file will adjust paths before loading ArcPy ensuring that the correct version of ArcPy is loaded.
Use
Place the arcpyloader.py file in the same directory as your code and use the following code to import ArcPy:
from arcpyloader import arcpyLicensing
Copyright 2018 Esri Canada - All Rights Reserved
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
A copy of the license is available in the repository's LICENSE file.
Support
This code is distributed as is and is not supported by Esri Canada, Esri Inc. or any other Esri distributor.