_assertionold.py 文件源码

def check(s, frame=None):
    if frame is None:
        frame = sys._getframe(1)
        frame = py.code.Frame(frame)
    expr = parse(s, 'eval')
    assert isinstance(expr, ast.Expression)
    node = Interpretable(expr.node)
    try:
        node.eval(frame)
    except passthroughex:
        raise
    except Failure:
        e = sys.exc_info()[1]
        report_failure(e)
    else:
        if not frame.is_true(node.result):
            sys.stderr.write("assertion failed: %s\n" % node.nice_explanation())


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# API / Entry points
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