如何根據條件從字符串的開頭刪除文本？

Question

假設我有以下文字：

'Reuters - Life is beautiful.'
'agency.com - China\'s currency remains pegged to the dollar and the US currency\'s sharp falls in recent months have therefore made - Chinese export prices highly competitive.'
'AP - The number of days that beaches closed or posted warnings because of pollution rose sharply in 2003 due to more rainfall, increased monitoring and tougher -standards, an environmental group said on Thursday.'
'CNN - Warming water temperatures - in the central equatorial Pacific last month may indicate the start of a new El Nino.'

我只想刪除位於"-"之前的文本開頭的所有文本，並且僅當"-"后跟一個空格時。

我想要類似的東西：

if line.startswith(code_to_match_my_condition):
      strip_matched_text_from_line

所以結果將是：

'Life is beautiful.'
'China\'s currency remains pegged to the dollar and the US currency\'s sharp falls in recent months have therefore made - Chinese export prices highly competitive.'
'The number of days that beaches closed or posted warnings because of pollution rose sharply in 2003 due to more rainfall, increased monitoring and tougher -standards, an environmental group said on Thursday.'
'Warming water temperatures - in the central equatorial Pacific last month may indicate the start of a new El Nino.'

我實際上不知道如何編碼。 我將不勝感激。

非常感謝您提前

Answer 1

您可能想要使用正則表達式，例如

^[^-]+-\s+

並將其替換為空字符串，請參閱regex101.com 上的演示。

---

在Python這可能是：

import re

strings = ['Reuters - Life is beautiful.',
           'agency.com - China\'s currency remains pegged to the dollar and the US currency\'s sharp falls in recent months have therefore made - Chinese export prices highly competitive.',
           'AP - The number of days that beaches closed or posted warnings because of pollution rose sharply in 2003 due to more rainfall, increased monitoring and tougher -standards, an environmental group said on Thursday.',
           'CNN - Warming water temperatures - in the central equatorial Pacific last month may indicate the start of a new El Nino.']

rx = re.compile(r'^[^-]+-\s+')

strings = list(map(lambda string: rx.sub("", string), strings))
print(strings)

和產量

['Life is beautiful.', "China's currency remains pegged to the dollar and the US currency's sharp falls in recent months have therefore made - Chinese export prices highly competitive.", 'The number of days that beaches closed or posted warnings because of pollution rose sharply in 2003 due to more rainfall, increased monitoring and tougher -standards, an environmental group said on Thursday.', 'Warming water temperatures - in the central equatorial Pacific last month may indicate the start of a new El Nino.']

Answer 2

用於搜索和刪除塊的簡單、可讀的代碼：

if " - " in line:
    index = line.find(" - ")
    line = line[index+3:]