text1 = ('周杰伦', 11, ['football', 'music'])
index = text1.index(11)
print(index)
print(text1[0])
del text1[2][1]
print(text1)
text1[2].append("coding")
print(text1)

my_str = "itheima and itcast"
index = my_str.index("and")
print(index)
#replac并没有修改字符串，而是创建了一个新的字符串
new_my_str = my_str.replace("it", "程序")
print(my_str, new_my_str)
#split 按分隔符分割字符串 成为列表
my_str = ("hello itheima itcast world")
my_list = my_str.split(' ')
print(my_list)