[Tutor] Help on best way to check resence of item inside list

[jarod_v6 at libero.it]

Dear All

clubA= ["mary","luke","amyr","marco","franco","lucia", "sally","genevra","
electra"]
clubB= ["mary","rebecca","jane","jessica","judit","sharon","lucia", "sally","
Castiel","Sam"]

I have a list of names that I would to annotate  in function of presence in
different clubs:

my input files is a long file where I have this :

mary
luke
luigi
jane
jessica
rebecca
luis
################################################à

with open("file.in") as p:
mit = []
for i in p:
   lines =i.strip("\n").split("\t")
   if  (lines[0] in clubA:
              G =lines[-1] +["clubA"]
   else:
           G = lines[-1] +["no"]  
mit.append(G)
  

for i in mit:
   if i.strip("\n").split("\t")[0] in clubB:
         G =lines[-1] +["clubB"]
   else:
           G = lines[-1] +["no"]  
  finale.append(G)
###############################################################
I just wonder if is appropriate to use a loops to check if is present the
value on a list. Is it the right way? I can use a dictionary because I have
many repeated names.

In the end I wan to have


mary  clubA clubB
luke clubA
luigi  no
Thanks in advance for any help