[Bug] "AttributeError: 'WindowsPath' object has no attribute 'split'". In tutorials/convert_excel_to_mtg.ipynb

[simonakasimon]

Hello when running the "all file into one directory" part I have this error :

`
1 directory_name= "breeding_value" # name of your directory containing .xlsx file
3 path=shared_data(openalea.strawberry).glob(directory_name+'*.xlsx')
----> 4 names=[filename.split("\")[-1].split(".")[0] for filename in path]
5 for name in names:
6 write_excel_to_mtg(directory_name=directory_name,filename=name)

AttributeError: 'WindowsPath' object has no attribute 'split'
`

I have a local branch in which I propose a fix.

[pradal]

Thanks. Please create a pull request from your branch.
Il will review it