擅长:python、mysql、java
<p>你是否已经提前知道了模式,或者模式是否曾经改变过?如果没有,那么你可以阅读文本文件,一行一行地,把句子分割成易于操作的部分,然后寻找模式。对于没有该字符串的行,可以将其连接到新字符串。我在下面所做的似乎奏效了:</p>
<pre><code>f = open("mytext.txt", "r")
final = ""
for line in f:
words = line.split(" ")
if(words[0] == "example" or words[len(words) - 1] == "block\n"):
continue
else:
final = final + line
print(final)
</code></pre>
<p>我得到的结果是:</p>
<pre><code>First sentence to keep.
Second sentence to keep.
Third sentence to keep.
</code></pre>