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# coding=utf-8
import threading
import python.engine
__all__ = ['PythonSession']
class PythonSession(object):
"""Abstracts a Python session.
Only public methods are available to the outside world due to the use of multiprocessing managers.
Therefore prefix any private methods with an underscore (_).
No properties are accessible; use getters and setters instead.
Values are passed by value instead of by reference (deep copy!).
"""
def __init__(self):
self._access_lock = threading.Lock()
self._interpreter = None
def create(self):
with self._access_lock:
if not self._interpreter:
self._interpreter = python.engine.create()
def pull(self):
with self._access_lock:
if self._interpreter is None:
return 'Python is not running'
return python.engine.pull(self._interpreter)
def push(self, stdin):
with self._access_lock:
if self._interpreter is not None:
python.engine.push(self._interpreter, stdin)
def destroy(self):
with self._access_lock:
if self._interpreter is not None:
python.engine.destroy(self._interpreter)
self._interpreter = None
def __del__(self):
if hasattr(self, '_interpreter') and self._interpreter is not None:
python.engine.destroy(self._interpreter)
self._interpreter = None
def test(self, user_id, problem_id, program):
return ['Python testing is not implemented yet']
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