f = open('bun.csv', 'r',encoding='UTF-8') x=[] for line in f: x.append(line) f.close() n=len(x)-1 sp=x[0] z=sp.split(",") a=[""] r=[0] for i in range(n): pp=x[i+1].split(",") a.append(pp[2]) r.append(pp[1]) print(a) print(r) dic=[""] for u in a: h=0 for i in dic: if u==i: h=100 if h<50: dic.append(u) print(dic)