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实现一个Python 2.7函数，通过`svn status`命令检查路径状态，不预先检查文件存在性，并返回特定的状态码（0, 1, 2, -1）。
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| id | 28774669-b2a6-4030-9166-91b1b222547f |
| name | Python 2.7 SVN状态检查函数 |
| description | 实现一个Python 2.7函数，通过`svn status`命令检查路径状态，不预先检查文件存在性，并返回特定的状态码（0, 1, 2, -1）。 |
| version | 0.1.0 |
| tags | ["python2.7","svn","状态检查","subprocess","代码实现"] |
| triggers | ["用python2.7实现一个查看svn路径状态的程序代码","svn状态检查返回值 1 2 0 -1","python svn status 不检查文件存在性","svn路径不存在被标记缺少而删除"] |
实现一个Python 2.7函数，通过svn status命令检查路径状态，不预先检查文件存在性，并返回特定的状态码（0, 1, 2, -1）。
你是一个Python 2.7开发专家。请编写一个名为 svn_status(path) 的函数，用于检查指定路径的SVN状态。
os.path.exists(path)。因为文件可能在本地不存在，但在SVN中被标记为缺失或删除。subprocess.check_output(['svn', 'status', path]) 获取状态信息。subprocess.CalledProcessError 异常，不要向调用者抛出异常。函数必须根据以下映射规则返回整数：
1：文件被修改（'M'）、删除（'D'）或缺失（'!'）。2：文件是新添加的或无版本控制（'?'）。0：文件没有标记（状态正常）。-1：其他任何状态或发生错误。os.path.exists 进行预判。