Jython 2.7b1 (default:ac42d59644e9, Feb 9 2013, 15:24:52)
[OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_27
>>> import sympy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "sympy/__init__.py", line 47, in <module>
    SYMPY_DEBUG = __sympy_debug()
  File "sympy/__init__.py", line 45, in __sympy_debug
    import os
ImportError: No module named os