PyJEXL

A Python-based JEXL parser and evaluator.

NOTE: This library handles the JEXL from TomFrost's JEXL library. It does NOT handle the similarly-named Apache Commons JEXL language.

Limitations and Differences from JEXL

• JavaScript-style implicit type conversions aren't supported, but may be added in the future. Instead, Python type semantics are used.
• Property access is only supported for mapping objects currently.
• Several odd edge-cases in JEXL are ignored because they are unintuitive, difficult to implement, or a bad pattern:
  • Implicitly using the first element in an array when chaining identifiers is not supported. In JEXL, if foo.bar is a list, the expression foo.bar.baz is equivalent to foo.bar[0].baz.
  • Conditional expressions (AKA ternary expressions) cannot have a missing consequent, i.e. "foo" ?: 4 is invalid.

License

Licensed under the MIT License. See LICENSE for details.