os.path模块

os.path模块主要用于文件的属性获取，点击文档地址

1. os.path.abspath(path)
   return a normalized absolutized version of the pathname path. equal to os.path.normpath(os.path.join(os.getcwd(),path))
dirPath = os.path.abspath(filename)
2. os.path.basename(path)
   return the base name of pathname path. if it is /foo/bar/ returns an empty string " "
3. os.path.dirname(path)
   return the directory name of pathname path.if it is /foo/bar returns /foo/
4. os.path.exists(path)
   return True if path refers to an existing path
5. os.path.isabs(path)
6. os.path.isfile(path)
7. os.path.isdir(path)
8. os.path.join(path,*paths)
   join one or more path components intelligently
9. os.path.normpath(path)
   normalize a pathname b collapsing redundant separators.
10. os.path.split(path)
    split the pathname path into a pair,(head,tail) where tail is the last pathname component and head is everything leading up to that.