8 d Z ddlZ G d d Zd Zd ZdS )z Basic subprocess implementation for POSIX which only uses os functions. Only implement features required by setup.py to build C extension modules when subprocess is unavailable. setup.py is not used on Windows. Nc e Zd ZddZd ZdS )PopenNc 0 || _ || _ d | _ d S N)_cmd_env returncode)selfcmdenvs