擅长:python、mysql、java
<p>使用<code>str.replace</code>。</p>
<pre><code>>>> papa.replace('papa', '')
' is a good man'
>>> app.replace('papa', '')
'app is important'
</code></pre>
<p>或者使用<a href="https://docs.python.org/library/re.html" rel="noreferrer">^{<cd2>}</a>和正则表达式。这将允许删除前导/尾随空格。</p>
<pre><code>>>> import re
>>> papa = 'papa is a good man'
>>> app = 'app is important'
>>> papa3 = 'papa is a papa, and papa'
>>>
>>> patt = re.compile('(\s*)papa(\s*)')
>>> patt.sub('\\1mama\\2', papa)
'mama is a good man'
>>> patt.sub('\\1mama\\2', papa3)
'mama is a mama, and mama'
>>> patt.sub('', papa3)
'is a, and'
</code></pre>