Python scheme_read示例

示例#1

文件： scheme_grader.py 项目： gezalb/CS61A-Berkeley

def scheme_eval(snippet):
    """Convert snippet into a single expression and scheme_eval it."""
    # TODO: figure out how to do this more cleanly
    buf = scheme.buffer_lines(snippet.split('\n'), show_prompt=True)
    exprs = []
    try:
        while True:
            exprs.append(scheme.scheme_read(buf))
    except EOFError:
        pass
    env = scheme.create_global_frame()
    try:
        for expr in exprs[:-1]:
            scheme.scheme_eval(expr, env)
        return scheme.scheme_eval(exprs[-1], env)
    except scheme.SchemeError as err:
        return 'SchemeError'
    except BaseException as err:
        return type(err).__name__ + ' ' + str(err)

示例#2

文件： scheme_grader.py 项目： JianfengYao/pyscheme

def scheme_eval(snippet):
    """Convert snippet into a single expression and scheme_eval it."""
    # TODO: figure out how to do this more cleanly
    buf = scheme.buffer_lines(snippet.split('\n'), show_prompt=True)
    exprs = []
    try:
        while True:
            exprs.append(scheme.scheme_read(buf))
    except EOFError:
        pass
    env = scheme.create_global_frame()
    try:
        for expr in exprs[:-1]:
            scheme.scheme_eval(expr, env)
        return scheme.scheme_eval(exprs[-1], env)
    except scheme.SchemeError as err:
        return 'SchemeError'
    except BaseException as err:
        return type(err).__name__ + ' ' + str(err)