Python Basic introduction （ A full set of nanny level tutorials ）

Chapter two

Section 9 ： Practice the answer

Small exercise (*):
Change all people surnamed Zhang into Wang ,lst = [‘ Zhao Min ’, ‘ Zhang Shaogang ’, ‘ zhang wuji ’, ‘ Wu zetian ’, ‘ Ying Zheng ’, ‘ d ’].

lst = [' Zhao Min ', ' Zhang Shaogang ', ' zhang wuji ', ' Wu zetian ', ' Ying Zheng ', ' d ']


# for item in lst: #  here ,  We can't see the index position of the element 
for i in range(len(lst)):  # len(lst) The length of the list  ->  You can get the list index directly for loop 
    item = lst[i]  # item Still every item in the list 
    if item.startswith(" Zhang "):
        #  Zhang Shaogang 
        new_name = " king "+item[1:]
        print(new_name)
        #  Put the new name back on the list ( Index is needed ?)
        lst[i] = new_name  #  modify 

print(lst)

summary ：
Well understand the list index for loop