pkgdata.py 文件源码

def getResource(identifier, pkgname=__name__):
    """
    Acquire a readable object for a given package name and identifier.
    An IOError will be raised if the resource can not be found.

    For example:
        mydata = getResource('mypkgdata.jpg').read()

    Note that the package name must be fully qualified, if given, such
    that it would be found in sys.modules.

    In some cases, getResource will return a real file object.  In that
    case, it may be useful to use its name attribute to get the path
    rather than use it as a file-like object.  For example, you may
    be handing data off to a C API.
    """
    if resource_exists(pkgname, identifier):
        return resource_stream(pkgname, identifier)

    mod = sys.modules[pkgname]
    fn = getattr(mod, '__file__', None)
    if fn is None:
        raise IOError("%s has no __file__!" % repr(mod))
    path = os.path.join(os.path.dirname(fn), identifier)
    if sys.version_info < (3, 3):
        loader = getattr(mod, '__loader__', None)
        if loader is not None:
            try:
                data = loader.get_data(path)
            except IOError:
                pass
            else:
                return BytesIO(data)
    return open(os.path.normpath(path), 'rb')