擅长:python、mysql、java
<p>这可以很容易地通过<strong>正则表达式来实现。
您可以阅读有关python正则表达式<a href="https://docs.python.org/3/howto/regex.html" rel="nofollow noreferrer">here</a>的更多信息</p>
<p>你可以这样用-</p>
<pre><code>import re
str1 = 'there is three - and now single - and now two '
str2 = re.sub(' -', '', str1)
print(str2)
</code></pre>
<p>输出-</p>
<pre><code>there is three and now single - and now two
</code></pre>
<p><a href="https://repl.it/repls/ClosedDrabFlash" rel="nofollow noreferrer">DEMO</a></p>