我有一個項目清單：例如：a = ['when', '#i am here','#go and get it', '#life is hell', 'who', '#i am here','#go and get it',]我想根據條件合并列表項，即合并所有項目，直到該項目在第一個位置具有 # 并將其替換為 when 或 who。我想要的輸出是：['when', 'when i am here','when go and get it', 'when life is hell', 'who', 'who i am here','who go and get it',]
3 回答
桃花長相依
TA貢獻1860條經驗 獲得超8個贊
您可以迭代a，如果單詞不是以 開頭，則保存該單詞，如果是'#'，則替換'#'為保存的單詞：
for i, s in enumerate(a):
if s.startswith('#'):
a[i] = p + s[1:]
else:
p = s + ' '
a 變成：
['when', 'when i am here', 'when go and get it', 'when life is hell', 'who', 'who i am here', 'who go and get it']
呼喚遠方
TA貢獻1856條經驗 獲得超11個贊
只需關閉您提供的信息，您就可以做到這一點。
a = ['when', '#i am here','#go and get it', '#life is hell', 'who', '#i am here','#go and get it']
whoWhen = "" #are we adding 'who or when'
output = [] #new list
for i in a: #loop through
if " " not in i: #if there's only 1 word
whoWhen = i + " " #specify we will use that word
output.append(i.upper()) #put it in the list
else:
output.append(i.replace("#", whoWhen)) #replace hashtag with word
print(output)
印刷：
['WHEN', 'when i am here', 'when go and get it', 'when life is hell', 'WHO', 'who i am here', 'who go and get it']
Process returned 0 (0x0) execution time : 0.062 s
Press any key to continue . . .
長風秋雁
TA貢獻1757條經驗 獲得超7個贊
干得好：
def carry_concat(string_list):
replacement = "" # current replacement string ("when" or "who" or whatever)
replaced_list = [] # the new list
for value in string_list:
if value[0] == "#":
# add string with replacement
replaced_list.append(replacement + " " + value[1:])
else:
# set this string as the future replacement value
replacement = value
# add string without replacement
replaced_list.append(value)
return replaced_list
a = ['when', '#i am here','#go and get it', '#life is hell', 'who', '#i am here','#go and get it',]
print(a)
print(carry_concat(a))
這打印：
['when', '#i am here', '#go and get it', '#life is hell', 'who', '#i am here', '#go and get it']
['when', 'when i am here', 'when go and get it', 'when life is hell', 'who', 'who i am here', 'who go and get it']
添加回答
舉報
0/150
提交
取消