擅长:python、mysql、java
<p>这将实现以下目的:</p>
<pre><code>str = "occurrence1 occurrence2 occurrence3 occurrence1 occurrence4"
print(str)
new_str = str.replace('occurrence1 ', "'occurrence1'")
print(new_str)
# result = 'occurrence1' occurrence2 occurrence3 'occurrence1' occurrence4
</code></pre>