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Submitting With the Python API


The Conductor client tools provide modules and classes to help you craft a submission in cases where a GUI submitter is not suitable.


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Quick Start

The Python code below demonstrates how to use the Submit class to create a command line job submission.

import logging
from conductor.lib import conductor_submit, package_utils, api_client

# Set up logging (optional)

# Create a dictionary of arguments for your job.
args = {}

# Give the job a title to help identify it in the web dashboard. 
args["job_title"] = "Test Job: Vray Standalone Test"

# Specify the Conductor project to associate this job with.
args["project"] = "default"

# Specify the what type of instance to use.
args["machine_flavor"] = "standard"
args["cores"] = 2

# Specify the list of file dependencies the job requires. 
# This includes textures, caches, plugins, tools.
# You may add files or directories from anywhere on your filesystem.
args["upload_paths"] = [

# Indicate that uploading should occur immediately. If this option is `False`, 
# it indicates that uploading will be handled by the Conductor uploader daemon. 
args["local_upload"] =  True

# If your job uses custom tools or plugins, you'll need to provide the necessary 
# environment so they can be found.
custom_environment = {
    "VRAY_PLUGINS_x64": "/path/to/tools/custom_vray/plugin",
    "LD_LIBRARY_PATH": "/path/to/tools/custom_vray/bin"

# Indicate which software packages should be made available for the job
# See the notes below for help on finding package IDs for each required 
# software package. 
args["software_package_ids"] = ["7208372e306614d514944938c395e0e7"]

# Request the packages that you want to use from Conductor. 
all_packages = api_client.request_software_packages() 
packages = [p for p in all_packages if p["package_id"] in args["software_package_ids"]]

# Merge the environments from your chosen packages with the custom environment. 
args["environment"] = package_utils.merge_package_environments(packages, base_env=custom_environment)

# Define the task data for the job. 
# Each Task entry defines a command to be excecuted. 
args["tasks_data"] = [ 
        "command":"vray -display=0 -sceneFile=/path/to/project/batman_0008.vrscene -imgFile=/path/to/project/output/output.exr",
        "frames": "8"
        "command":"vray -display=0 -sceneFile=/path/to/project/batman_0024.vrscene -imgFile=/path/to/project/output/output.exr",
        "frames": "24"

# Define the directory where rendered images can be found when tasks are complete.
args["output_path"] = "/path/to/project/output"

# Instantiate a Submit object with the job args.
submission = conductor_submit.Submit(args)

# Run the submission
response, response_code = submission.main()

# Inspect the response code
print response_code
# 201

# Inspect the response
print response
# {u'body': u'job submitted.',
#  u'jobid': u'00695',
#  u'status': u'success',
#  u'uri': u'/jobs/00695'}

Package Ids

Use the Python code below to find package_ids for the packages you require.

from conductor.lib import api_client

packages = api_client.request_software_packages()
packages = sorted(packages, key=lambda x: x["relative_path"])
print "\n".join(["{} -- {}".format(p["package_id"], p["relative_path"]) for p in packages])


The list below describes all available submission arguments.


Dictates auto-retry behavior for unsuccessful tasks. This is particularly useful for preemptible instances, but keep in mind that you will get charged for automatically retried tasks.

"autoretry_policy": { 
  "preempted": { "max_retries": 2 },  # when a task is preempted
  "failed":    { "max_retries": 0 }   # when a task fails


The number of frames to render per task.

"chunk_size": 15


The number of cpu cores the instance will have (2 minimum for highmem and highcpu instance types)

"cores": 64


Only relevant when using the uploader daemon. Dictates md5 hash values that specific files must adhere to upon uploading via the uploader daemon. This is a mechanism to ensure that a file has not been modified between the time the job was submitted and the time the uploader daemon started to upload.

{"/tmp/": "GDVem8GYRUuh4douZwIwFg=="}


Specifies environment variables to be set om the render machine.

{"PYTHONPATH": "/tmp/site-packages:/tmp/pipeline/site-packages"}


The title displayed in the web dashboard.

"title": "My maya job"


Dictates whether the submission will upload the job's dependencies immediately (True) or queue them for an uploader daemon to handle (False).

"local_upload": False


A string that indicates which location the job should be associated with. This option is relevant if you submit jobs from different locations. These could be differing geographic locations or simply machines that have differing file system views.

Typically each location should have its own Conductor downloader and uploader daemons running. The location feature allows each daemon to target only jobs that match its corresponding location.

"location": "mars"


The instance type to use for the job. This works together with the cores argument. Valid options are:

  • standard
  • highcpu
  • highmem
"machine_flavor": "highcpu"


Add custom metadata data to the job submission to help filter usage reports and so on.

"metadata": {"shot": "Ez500", "asset": "apple"}


Emails addresses to be notified when the job is complete.


The directory where images and other output files are written. This is also the location on the local filesystem where files will be downloaded to.

"output_path": "/tmp/render_output"


Whether the job uses preemptible instances.

"preemptible": True


Specify whether this job should take preference over other jobs in your account.

"priority": 800


The name of the Conductor project to associate this job with.

    "project": "Spiderman"


Tasks that contain scout frames are run immediately, while the rest are put on hold.

"scout_frame": "1-100x5"


Ids for software packages to use for the job. Packages are identified by their ID number, which can be queried from Conductor's rest api.

"software_package_ids": ["ae8026b7d9cfe524a77a3ebe94b9130a",  "7208372e306614d514944938c395e0e7"]


The definition of tasks. Each task dictionary must contain a command to be executed. It may optionally contain a frames field, which helps to determine whether it is a scout-frame.

"tasks_data": [
    "command":"vray -display=0 -sceneFile=/tmp/batman_0008.vrscene",
    "frames": "8"
    "command":"vray -display=0 -sceneFile=/tmp/batman_0024.vrscene",
    "frames": "24"}


A list of files and directories to be uploaded.

"upload_paths": ["/tmp/sourceimages", "/tmp/"]