[英]Reverse-replacing the first letter of each word with the letter of the previous word
I've written a function that takes a message (string) as an input and replaces the first letter of each word with the first letter of the previous word (for the very first word, I take the first letter of the last word):我编写了一个函数,它将消息(字符串)作为输入,并将每个单词的第一个字母替换为前一个单词的第一个字母(对于第一个单词,我取最后一个单词的第一个字母):
def changeFirst(message):
msg_list=list(message)
j=0
pre=msg_list[j]
for i in range(len(msg_list)):
if msg_list[i]==' ':
nextpre=msg_list[i+1]
msg_list[i+1]=pre
pre=nextpre
msg_list[0]=pre
msg_list=''.join(msg_list)
return msg_list
changeFirst("now you are in love with me")
mow nou yre an iove lith we
I want to write a funtion UnchangeFirst()
which reverses this function, for example it should work like this:我想写一个函数UnchangeFirst()
来反转这个函数,例如它应该像这样工作:
UnchangeFirst("mow nou yre an iove lith we")
now you are in love with me
How can I reverse this function?我怎样才能反转这个功能?
Here it is!这里是!
def changedAgain(message2):
msg_list = list(message2)
j = 0
first=msg_list[0]
for i in range(len(msg_list)):
if msg_list[i]==' ':
msg_list[j]=msg_list[i+1]
msg_list[i+1]=msg_list[j]
j=i+1
msg_list[j]=first
return(''.join(msg_list))
message2="mow nou yre an iove lith we"
print(changedAgain(message2))
>>> "now you are in love with me"
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