Environment Variables

The MLTK uses the following optional environment variables:

MLTK_MODEL_PATHS

This should be a list of directory paths to search for MLTK models. Each directory path should be delimited with the OS’s path delimiter

• Windows - Semicolon ;

• Linux - Colon :

See Model Search Path for more details.

MLTK_CACHE_DIR

Specify the directory path to the MLTK’s cache directory. If omitted, the MLTK defaults to the directory: ~/.mltk

MLTK_USER_SETTINGS_PATH

Specify the path to the user_settings.yaml. If omitted, the settings file points to ~/.mltk/user_settings.yaml.

MLTK_READONLY

Set this variable to 1 to indicate that the MLTK is running on a “read-only” file-system. This is useful if te MLTK package is running in a cloud “lambda” function.

When set, the MLTK will only write to the OS’s temporary directory.

MLTK_SETUP_PY_DEPS

This is used by setup.py, the script used to install the MLTK Python package. This may be used to override the MLTK Python package dependencies.

This should contain a list of install requirements delimited by a pipe |, e.g.:

export MLTK_SETUP_PY_DEPS="tensorflow==2.4.4|numpy==1.19.5|tflite-support==0.2.0|tensorflow_probability==0.12.2|onnxruntime==1.9.0|typing-extensions==3.7.4"

MLTK_TEMP_DIR

The temporary directory used by the MLTK. If not defined, then this defaults to: $TEMP/<user name>/mltk