LeetCode Python runtime version compatibility

LeetCode accepts solutions written in Python, but the platform does not disclose the exact interpreter version employed during judging.

Community observations suggest the default may be Python 3.8, yet some submissions using features introduced in Python 3.10 (such as the match statement) have been reported as accepted, indicating a possible version upgrade or a heterogeneous execution environment.

The goal is to determine the precise Python version that LeetCode’s judge uses so that developers can write compatible code and avoid reliance on undocumented language features.

What is the exact Python version used by LeetCode’s judge as of 2024? Does the environment support Python 3.10+ syntax such as structural pattern matching? Are there any version‑specific performance characteristics that could cause otherwise correct solutions to exceed time or memory limits?