python练习1-疯狂填词小游戏

疯狂填词程序:

它将读入文本文件，并让用户在该文本文件中出现 ADJECTIVE、NOUN、ADVERB 或 VERB 等单词的地方，
加上他们自己的文本。
例如，一个文本文件可能看起来像这样：
The ADJECTIVE panda walked to the NOUN and then VERB. A nearby NOUN wasunaffected by these events.

程序将找到这些出现的单词，并提示用户取代它们
Enter an adjective:
silly
Enter a noun:
chandelier
Enter a verb:
screamed
Enter a noun:
pickup truck

以下的文本文件将被创建：
The silly panda walked to the chandelier and then screamed. A nearby pickuptruck was unaffected by these events.

mystr='The ADJECTIVE panda walked to the NOUN and then VERB . A nearby NOUN was unaffected by these events'

print('原字符串:'+mystr)
mylist=mystr.split(' ')
print(mylist)


for i in range(len(mylist)):
	str=mylist[i]
	if str=='ADJECTIVE' or str=='NOUN' or str=='VERB'or str=='ADVERB':
		user_input=input('Enter an %s'%(str.lower()))
		mylist[i]=user_input

newstr=' '.join(mylist)
print('新字符串:'+newstr)