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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_basedir(path):
 """Returns the base directory of a path. Examples: get_basedir('foo/bar/baz') --> 'foo' get_basedir('/foo/bar/baz') --> '' get_basedir('foo') --> 'foo' """

  return path[:path.index(os.sep)] if os.sep in path else path