ninia/jep

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1488 stars · 165 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Jep is a library that embeds CPython in the Java Virtual Machine through JNI, allowing Java applications to run Python code and use Python modules natively. It supports multiple sub-interpreters, an interactive console, and NumPy interop with Java primitive arrays.

Use cases

• call python code from a java application
• embed cpython in the jvm via jni
• script java applications with python without recompiling
• use python libraries like numpy from java
• run multiple sandboxed python sub-interpreters in java
• bridge java and python data types

When to choose

• you need the real CPython interpreter inside a Java app for speed and module compatibility
• you want to script or extend established Java code with Python
• you need NumPy array interop with Java primitive arrays

When to avoid

• you only need to run Python as a separate process or microservice
• you want pure-Java Python integration without native dependencies
• your project requires GraalVM or Jython-style pure-JVM interoperability

Facets

library · maturity active

interpreter sdk concurrency developer-tools programming-languages cross-platform jvm python cross-platform windows jni cpython embedding jvm interop linux macos

Member repositories

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