into your application or library. Example uses:
* Safely process an expression entered through a web application, for example
some formula to be plotted. The library allows safe translation of such
expression without exposing any application's internals
* precompiler that checks for allowed and denied identifiers in an expression
* have a common expression language through your application regardless of the
backend languages
* compile arithmetic expression to any other expression tree (semantic), for
example SQLAlchemy expression objects
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