Environment variables

Supervisely sets default environment variables for each Supervisely Application run. You can also use these environment variables for your development and debugging.

Supervisely has the set default environment variables, Supervisely Application has access to them and we recommend using the same variables during development and debugging.

Environment variables are case-sensitive.

For development and debugging purposes you can manually copy the ID to a clipboard for every item you are working on: team, workspace, project, dataset, image, labeling job, team member, etc... Just open the context menu of the item and press Copy ID button.

.ENV file

For convenient development and debugging we recommend using .env files to avoid hardcoding test variables into your sources and keep private your passwords, secrets, and other sensitive information. Also, it allows avoiding accidentally committing (exposing) these values to a git repository.

Save .env file to ~/supervisely.env with your credentials. The content of this file will look something like this:

SERVER_ADDRESS="https://app.supervisely.com"
API_TOKEN="4r47N.....blablabla......xaTatb"

Also with every tutorial, guide, and demo application you will find local.env file that contains other environment variables used for debugging. For example:

# change the Project ID to your value
PROJECT_ID=12208 # ⬅️ change it

And then load it in your python code using is_development method:

import os
from dotenv import load_dotenv
import supervisely as sly

if sly.is_development():
    load_dotenv("local.env")
    load_dotenv(os.path.expanduser("~/supervisely.env"))

api = sly.Api.from_env()

is_development and is_production methods are used to check the environment variable that tells if the app is spawned in IDE in debug mode on localhost or spawned on the platform (production mode).

Basic usage principle

Environment variables could be read both with a pure python, and with our SDK. TEAM_ID variable will be used down below for an example, this logic cn be applied to every variable.

Read environment variable with pure python:

import os
from dotenv import load_dotenv
import supervisely as sly

if sly.is_development():
    load_dotenv(os.path.expanduser("~/supervisely.env"))
    load_dotenv("local.env")

team_id = int(os.environ["TEAM_ID"])

Read environment variable with our SDK:

import supervisely as sly
from dotenv import load_dotenv

if sly.is_development():
    load_dotenv(os.path.expanduser("~/supervisely.env"))
    load_dotenv("local.env")

team_id = sly.env.team_id()

Keep in mind that every example in our portal features reading environment variables with SDK methods.

It is important to note that reading method for every variable in our SDK has an optional raise_not_found flag with default value True. It means that an exception is raised if an env variable is not found.

Sometimes it is convenient to set this argument raise_not_found as False when you, for example, wait for either PROJECT_ID or DATASET_ID variable, and you don't want an exeption to be raised every time either of those is not found.

It is also worth mentioning that it is possible to use legacy variable names, like the context.teamId for compatibility purposes.

Video tutorial

Here is a quick demo on environment variables usage in python:

You can try example shown in the video for yourself: find the repository with this app on GitHub.

Environment variables

Here is a list of environment variables you could use in app development.

`SERVER_ADDRESS`

address of your Supervisely instance, for Community Edition the value should be https://app.supervisely.com. For the Enterprise Edition the value is custom and depends on your configuration. Learn more here. This variable is always passed to an App.

`API_TOKEN`

Your personal access token for authentication. Learn more here. This variable is always passed to an App.

We recommend reading API_TOKEN and SERVER_ADDRESS variables from a seperate environment file, as those variables are essential to authenticate in Supervisely platfrom, and thus are always passed to an App. Learn more about authentication here.

`TASK_ID`

When you run an app on Supervisely, the platform creates a task for this app to store all relevant information for this task (logs, persistent data, cache, temporary files, ...). Task ID is needed to access this data (read or write). This variable is always passed to an App.

How to read TASK_ID from environment file with SDK:

task_id = sly.env.task_id()

`TEAM_ID`

The ID of the currently opened team. This variable is always passed to an App.

How to read TEAM_ID from environment file with SDK:

team_id = sly.env.team_id()

Alternative env is duplicated for compatibility: context.teamId

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_TEAMID is available starting from Agent version >=6.7.0.

`WORKSPACE_ID`

The ID of the currently opened workspace. This variable is always passed to an App.

How to read WORKSPACE_ID from environment file with SDK:

workspace_id = sly.env.workspace_id()

Alternative env is duplicated for compatibility: context.workspaceId

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_WORKSPACEID is available starting from Agent version >=6.7.0.

`USER_LOGIN`

Name of the user who run (spawned) current application session (task_id).

How to read USER_LOGIN from environment file with SDK:

user_login = sly.env.user_login()

Alternative env is duplicated for compatibility: context.userLogin

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_USERLOGIN is available starting from Agent version >=6.7.0.

`USER_ID`

ID of the user who run (spawned) current application session (task_id).

How to read USER_ID from environment file with SDK:

user_id = sly.env.user_id()

Alternative env is duplicated for compatibility: context.userId

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_USERID is available starting from Agent version >=6.7.0.

`APP_NAME`

Name of the app that is being spawned.

app_name = sly.env.app_name()

The application name that you use in this variable is only used while debugging. The production name of the app is defined in configuration file.

`PROJECT_ID`

It is set when an app is spawned from the context menu of a project. For apps, that are running on agents with version <= 6.6.6, please use **modal.state.slyProjectId ** or be sure that you are using the latest version of the Supervisely Agent (recommended).

How to read PROJECT_ID from environment file with SDK:

project_id = sly.env.project_id()

Alternative env is duplicated for compatibility: context.projectId

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_PROJECTID is available starting from Agent version >=6.7.0.

`DATASET_ID`

It is set when an app is spawned from the context menu of a dataset. For apps, that are running on agents with version <= 6.6.6, please use **modal.state.slyDatasetId ** or be sure that you are using the latest version of the Supervisely Agent (recommended).

How to read DATASET_ID from environment file with SDK:

dataset_id = sly.env.dataset_id()

Alternative env is duplicated for compatibility: context.datasetId

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_DATASETID is available starting from Agent version >=6.7.0.

`FOLDER`

It is set when an app is spawned from the context menu of a folder in Team Files. For apps, that are running on agents with version <= 6.6.9, please use **modal.state.slyFolder ** or be sure that you are using the latest version of the Supervisely Agent (recommended).

How to read FOLDER from environment file with SDK:

folder = sly.env.folder()

Alternative env is duplicated for compatibility: context.slyFolder

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_SLYFOLDER is available starting from Agent version >=6.7.0.

`FILE`

It is set when an app is spawned from the context menu of a file in Team Files. For apps, that are running on agents with version <= 6.6.9, please use **modal.state.slyFile ** or be sure that you are using the latest version of the Supervisely Agent (recommended).

How to read FILE from environment file with SDK:

env_file = sly.env.file()

Alternative env is duplicated for compatibility: context.slyFile

Some Docker images do not support env names with dot . symbols. For such cases, the alternative variable CONTEXT_SLYFILE is available starting from Agent version >=6.7.0.

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