schemepy是使用python写的支持尾递归的scheme解释器。
scheme是通常的执行入口。执行.cdp文件时按照coredump文件加载，执行.scc文件时会按照编译后内容加载，其他扩展名按照scheme源文件加载。不加任何参数时进入交互模式。
- -c: 编译文件
- -d: 调试模式
- -h: 帮助
- -i: 格式化文件
- -n: 禁用coredump
- -p: 显示解析树
编译会将.scm文件编译为.scc文件。编译后的文件主要包括解析树，载入.scc可以避免再次解析。
格式化会读入文件并按照格式重新打印出来。
一个简单的例子，描述了中断/再执行模式是如何工作的。
Copyright (C) 2012 Shell Xu
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