tools.py 文件源码

def find_library(libname):
    """
    Search for 'libname.so'.
    Returns library loaded with ctypes.CDLL
    Raises OSError if library is not found
    """
    base_path = os.path.dirname(__file__)
    lib, search_paths = None, []
    so_extensions = [ ext for ext, _, typ in imp.get_suffixes()
            if typ == imp.C_EXTENSION ]
    for extension in so_extensions:
        search_paths += [
            os.path.abspath(os.path.normpath(
                os.path.join( base_path, '..', libname + extension ))),
            os.path.abspath(os.path.normpath(
                os.path.join( base_path, '../..', libname + extension )))
            ]

    for path in search_paths:
        if os.path.exists(path):
            lib = path
            break

    if not lib:
        raise OSError('Cant find %s.so. searched at:\n %s' % (
            libname, '\n'.join(search_paths)))
    return ctypes.CDLL(lib)