my_str = "itheima itcast boxuegu"
count =my_str.count("it")
print(f"字符串中共有{count}个“it”字符")
new_my_str = my_str.replace(" ","|")
print(f"{new_my_str}")
my_str_list = new_my_str.split("|")
print(f"{my_str_list}")