编写一个名为is_abecedarian 的函数, 如果单词中的字符以字符表的顺序出现 (允许重复字符),则返回True。有多少个具备这种特征的单词?
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| def word_abcde(word):
alphabets = "abcdefghijklmnopqrstuvwxyz"
i = 0
front = 0 #前一个字母的序数
mine = 0 #当前字母的序数
while i < len(word):
index = 0
while index < len(alphabets):
# print(i,word[i],index,alphabets[index])
if word[i] == alphabets[index]:
mine = index
if mine < front:
return False
else:
front = mine
break
index += 1
i += 1
return True
def is_abecedarian(file_in):
count = 0
for line in file_in:
word = line.strip()
if word_abcde(word):
count += 1
#print(word)
print(count)
fin = open('words.txt')
is_abecedarian(fin)
|
我所使用的这个单词表里，这样的单词有596个。