Split string using variable found in a list

[japo85]

Hello,
I have to split a string using a variable found in a list, but it doesn't work. This is my code:
causali = ['IP', 'TP', 'PR1', 'PR2', 'PR3', 'TP', 'BC', 'BF', 'VP', 'RP']
file = ('12011191-92-95-202-203_220701_PR1 - Copia')
print (file)

causale=str([ele for ele in causali if ele in file])
print (causale)

ls=file.split(causale)
print (ls)

and this is my output:

12011191-92-95-202-203_220701_PR1 - Copia
['PR1']
['12011191-92-95-202-203_220701_PR1 - Copia']

What's wrong?

[Axel_Erfurt]

causali = ['IP', 'TP', 'PR1', 'PR2', 'PR3', 'TP', 'BC', 'BF', 'VP', 'RP']
file = ('12011191-92-95-202-203_220701_PR1 - Copia')
print (file)

causale=[ele for ele in causali if ele in file]
print (causale)

ls=file.split(causale[0])
print (ls)

Output:
12011191-92-95-202-203_220701_PR1 - Copia
['PR1']
['12011191-92-95-202-203_220701_', ' - Copia']

[japo85]

Thank you very much, perfect!