正則表達式來刪除首字母縮略詞中的句點？

Question

我想從字符串中刪除首字母縮略詞中的句點，但我也希望o定期（例如在句子結尾）保留句號。

所以下面的句子：

"The C.I.A. is a department in the U.S. Government." 

應該成爲

"The CIA is a department in the US Government." 

有沒有乾淨的方式來做到這一點使用Python？到目前爲止，我有兩個步驟：

words = "The C.I.A. is a department in the U.S. Government." 
words = re.sub(r'([A-Z].[A-Z.]*)\.', r'\1', words) 
print words 
# The C.I.A is a department in the U.S Government.  
words = re.sub(r'\.([A-Z])', r'\1', words) 
print words 
# The CIA is a department in the US Government. 

Answer 1

大概是這樣嗎？

>>> re.sub(r'(?<!\w)([A-Z])\.', r'\1', s) 
'The CIA is a department in the US Government.' 

更換已經由一個大寫的單個字母開頭所提供的單個字母沒有立即在\w字符集前面任何單獨點。後面的標準由負反序斷言 - (?<!\w)執行。