How to check an array exist in a file using Python

[fitrisibarani]

I tried this one and I got it. But I can not figure out to write the result to a file. Any idea?

FBlist_set = set(FBlist)
Array_set = set (Array)

if Array_set & FBlist_set:
	print ("found")
 	result.write("found") #??????
else:
	print ("Not Found")