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Evaluate a Wolfram Language Expression from Python

Evaluate local Wolfram Language code directly from Python with a persistent kernel session.

Using a Wolfram notebook... Create a local Wolfram Language session

Import the module:

from wolframclient.evaluation import WolframLanguageSession

Create a session using the default path:

session = WolframLanguageSession()

The default path depends on the environment and may also depend on the version of the Wolfram Engine being used.
To create a session with a nondefault path, provide the path to the Wolfram Engine as the first argument, e.g.: WolframLanguageSession(‘C:/Program Files/Wolfram Research/Mathematica/12.0/wolfram.exe’).

Evaluate Wolfram Language expressions

Import the function:

from wolframclient.language import wlexpr

Compute the squares of an array of integers:

session.evaluate(wlexpr('Map[#^2 &, Range[5]]')) End the the session

Terminate the session object:

The session must be terminated to properly shut down the Wolfram Engine process.

Using a Jupyter notebook... Create a local Wolfram Language session

Import the module:

Create a session using the default path:

The default path depends on the environment and may also depend on the version of the Wolfram Engine being used.
To create a session with a nondefault path, provide the path to the Wolfram Engine as the first argument, e.g.: WolframLanguageSession(‘C:/Program Files/Wolfram Research/Mathematica/12.0/wolfram.exe’).

Evaluate Wolfram Language expressions

Import the function:

Compute the squares of an array of integers:

End the the session

Terminate the session object:

The session must be terminated to properly shut down the Wolfram Engine process.

Using the command line... Create a local Wolfram Language session

Open a terminal window and invoke the Python interpreter:

Import the module:

>>> from wolframclient.evaluation import WolframLanguageSession

Create a session using the default path:

>>> session = WolframLanguageSession()

The default path depends on the environment and may also depend on the version of the Wolfram Engine being used.
To create a session with a nondefault path, provide the path to the Wolfram Engine as the first argument, e.g.: WolframLanguageSession(‘C:/Program Files/Wolfram Research/Mathematica/12.0/wolfram.exe’).

Evaluate Wolfram Language expressions

Import the function:

>>> from wolframclient.language import wlexpr

Compute the squares of an array of integers:

>>> session.evaluate(wlexpr('Map[#^2 &, Range[5]]')) 
[1, 4, 9, 16, 25]

End the the session

Terminate the session object:

Exit the Python shell:

The session must be terminated to properly shut down the Wolfram Engine process.

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