In Julia, the dirname() function can be used to get the parent directory path of a file or directory path. Here is an example:
julia> dirname("/path/to/file.ext")
"/path/to"
julia> dirname("/absolute/path/to/directory/")
"/absolute/path/to"
julia> dirname("relative/path/to/directory/")
"relative/path/to"
Here, the dirname() function takes a string argument representing a file or directory path and returns a string representing its parent directory path. If the argument is a path to a file, the function returns the path to the directory that contains the file. If the argument is a path to a directory, the function returns the path to its parent directory.
Note that the function works correctly with both absolute and relative paths.