UnregisterExternalEvaluator   

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UnregisterExternalEvaluator[sys,evaluator]

unregisters the external evaluator referenced by evaluator for system sys so that it is not used by ExternalEvaluate and related functions.

Details

Examples

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Basic Examples  (2)

Remove an evaluator so that ExternalEvaluate cannot find it:

Register the evaluator so it can be used:

Unregistering an evaluator does not prevent explicit usage:

Register it again with RegisterExternalEvaluator to restore the previous condition:

Scope  (2)

Get all installations and randomly choose one to be the preferred installation:

Unregister all installations except the preferred one:

Now all of the installations except the preferred are unregistered for use:

Define a reference to a database using SQLite:

Register the database using RegisterExternalEvaluator:

When using ExternalEvaluate, "SQL" will use the most recently registered database:

Unregister the database:

Wolfram Research (2017), UnregisterExternalEvaluator, Wolfram Language function, https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html (updated 2020).

Text

Wolfram Research (2017), UnregisterExternalEvaluator, Wolfram Language function, https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html (updated 2020).

CMS

Wolfram Language. 2017. "UnregisterExternalEvaluator." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html.

APA

Wolfram Language. (2017). UnregisterExternalEvaluator. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html

BibTeX

@misc{reference.wolfram_2025_unregisterexternalevaluator, author="Wolfram Research", title="{UnregisterExternalEvaluator}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html}", note=[Accessed: 29-April-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_unregisterexternalevaluator, organization={Wolfram Research}, title={UnregisterExternalEvaluator}, year={2020}, url={https://reference.wolfram.com/language/ref/UnregisterExternalEvaluator.html}, note=[Accessed: 29-April-2025 ]}