擅长:python、mysql、java
<p>一行解决方案</p>
<pre><code>string = "Thisssssssss isisisis echooooooo stringggg. Replaceaceaceace repeatedededed groupssss of symbolssss"
print(re.sub(r'([a-z]+?)\1+', r'\1', string))
#This is echo string. Replace repeated groups of symbols
</code></pre>