Question

关于用python写一个函数，基础题

请大家帮我看看这道题

要求函数least_vowel_words(text)
可以找出一段text中，哪个单词的元音占的比例最小
例如：
“take”就是 2/4=0.5

>>>least_vowel_words("i do go to school.")
["do", "go"]

谢谢各位！

Answer 1

不应该是school么？ 比例是0.333333333

def least_vowel_words(text):
    line=text.strip('.').split()
    wdict=dict()
    vowel='aeiouAEIOU'
    for word in line:
        num = 0.0
        for chr in word:
            if chr in vowel:
                num+=1
        r=str(float(num/len(word)))
        if r in wdict:
            wdict[r]=wdict[r]+[word]
        else:
            wdict[r]=[word]
    print wdict[min(wdict.keys())]

追问

谢谢，但是有一个问题，
如果text = ‘this morning is nice. how do you think?'

你的code没办法去掉这个text里面的句号和问号呀。

追答

用正则就好了.
import re
def least_vowel_words(text):
line=re.findall(r'\w+', text)
wdict=dict()
vowel='aeiouAEIOU'
for word in line:
num = 0.0
for chr in word:
if chr in vowel:
num+=1
r=str(float(num/len(word)))
if r in wdict:
wdict[r]=wdict[r]+[word]
else:
wdict[r]=[word]
print wdict[min(wdict.keys())]

追问

我试了一下，的确可以，只是我们还没学到你后来用的方法诶，
请问有简单的办法不？比如说把？。，；这些符号转化成空格？

追答

那就用replace吧，把所有情况都替换掉就可以了。
import re
def least_vowel_words(text):
line=text.replace(","," ")
line=line.replace("?"," ")
line=line.replace("!"," ")
line=line.replace("."," ")
line=line.replace(";"," ")
line=line.split()
wdict=dict()
vowel='aeiouAEIOU'
for word in line:
num = 0.0
for chr in word:
if chr in vowel:
num+=1
r=str(float(num/len(word)))
if r in wdict:
wdict[r]=wdict[r]+[word]
else:
wdict[r]=[word]
print wdict[min(wdict.keys())]

Answer 2

def isVowel(a):
    if a in "aeiouAEIOU":
        return True
    else:
        return False
 def Calculate(a):
    i = 0
    for s in a:
        if isVowel(s):
            i+=1
    return i/len(a)
def least_vowel_words(text):
        dicte = dict()
        list = text.strip('.').split()
        for a in range(0,len(list)):
            dicte[list[a]]= str(Calculate(list[a]))
        i=min(dicte.values())
        for k in dicte:
            if dicte[k]==i:
                print (str(i)+":"+str(k))

追问

谢谢，但是有一个问题，如果text = ‘this morning is nice. how do you think?'

你的code没办法去掉这个text里面的句号和问号呀。