Send list from Python to Prolog PySwip

Question

I`m writing a program on Python and Prolog, using the library PySwip. I need to send list from Python to Prolog. i did it like this:

from pyswip import Prolog
p = Prolog()
p.assertz("fruits([apple,banana,orange])")  # Create list
p.assertz("result(X) :- fruits(L), member(X, L)")  # Rule for checking if an element in a list
print(list(p.query("result(orange).")))  # Return True if element in list

But i need to make list a separate object, because execute some actions before question. Help me how to send object in Prolog

from pyswip import Prolog
p = Prolog()
fruits = [apple,banana,orange]
p.assertz("How send to list fruits ???") # I dont know how to write this request  

Thank you everyone for advance

Answer 1

I don't know Prolog and PySwip and I don't know if I understand problem but it looks like normal string so you could convert to string using "fruit( {} )".format(fruits) or using f-string f"fruit( {fruit} )"

from pyswip import Prolog

p = Prolog()

fruits = ['apple','banana','orange']

text = f"fruits({fruits})"
print(text)

p.assertz(text)
p.assertz("result(X) :- fruits(L), member(X, L)")

print(list(p.query("result(orange).")))

But in Python it has to be list with strings.

And it will create string fruits(['apple', 'banana', 'orange']) with items in quotes ' ' .

I don't know if quotes makes some problem but if you need without quotes

fruits = ['apple','banana','orange']

text = ','.join(fruits)     # apple,banana,orange

text = f"fruits([{text}])"  # fruits([apple,banana,orange])

print(text)