python中循环取元组中的数据

python中循环取元组中的数据：

yuanzu_s = ("one", "two", "three", "four",);

print(yuanzu_s[0]);
print(len(yuanzu_s));
print(len(yuanzu_s[0]));
i = 0;
for i in yuanzu_s:
    print(i);