如何刪除換行符，但在文本文件中保留空白行？

Question

我的問題與此處發現的問題基本相同，但我想使用python 3執行該操作。文件中的文本如下所示：

'''
Chapter One ~~ Introductory


The institution of a leisure class is found in its best development at
the higher stages of the barbarian culture; as, for instance, in feudal...
'''

根據我發現的眾多建議，我嘗試了：

with open('veblen_txt_test.txt', 'r') as src:
    with open('write_new.txt', 'w') as dest:
       for line in src:
           if len(line) > 0:
               line = line.replace('\n', ' ') 
               dest.write(line)
           else:
               line = line + '\n\n'
               dest.write('%s' % (line))

但這返回：

'''
Chapter One ~~ Introductory  The institution of a leisure class is found in its best development at the higher stages of the barbarian culture; as, for instance, in feudal...
'''

預期的輸出是：

'''
Chapter One ~~ Introductory  


The institution of a leisure class is found in its best development at the higher stages of the barbarian culture; as, for instance, in feudal...
'''

我試過使用rstrip() ：

with open('veblen_txt_test.txt', 'r') as src:
    with open('write_new.txt', 'w') as dest:
       for line in src:
           if len(line) > 0:
               line = line.rstrip('\n') 
               dest.write('%s%s' % (line, ' '))
           else:
               line = line + '\n\n'
               dest.write('%s' % (line))

但這會產生相同的結果。

大部分在線答復都是刪除空格，而不是保留空格； 我毫不懷疑，解決方案很簡單，但是我花了大約一個半小時的時間來嘗試上述代碼的各種變體，然后才想問問社區。 謝謝你的協助！

Answer 1

如果我們將len(line) > 0更改為len(line) > 1 ，它將完成工作。 這是因為\\n算作1個字符。 您還必須刪除此行： line = line + '\\n\\n'因為它會增加4條額外的行（因為在Chapter One ~~ Introductory和The institution...之間有兩個\\n 。

輸出：

Chapter One ~~ Introductory 

The institution of a leisure class is found in its best development at the higher stages of the barbarian culture; as, for instance, in feudal...