擅长:python、mysql、java
<p>您可以使用<code>replace()</code>函数</p>
<p><strong>语法:</strong></p>
<pre><code>string.replace(old, new, count)
</code></pre>
<p><strong>参数:</strong></p>
<ul>
<li><strong>旧的</strong>–要替换的旧子字符串</李>
<li><strong>新建</strong>–将替换旧子字符串的新子字符串</李>
<li><strong>计数</strong>–用新子字符串替换旧子字符串的次数。(可选)</li>
</ul>
<p><strong>返回值:</strong></p>
<blockquote>
<p>It returns a copy of the string where all occurrences of a substring are replaced with another substring.</p>
</blockquote>
<p><strong>代码示例:</strong></p>
<pre><code>a = "2"
str_to_replace = "//media.boohooman.com/i/boohooman/mzz11035_black_xl/mens-black-man-signature-embroidered-t-shirt?$product_page_main_magic_zoom$&fmt=webp"
old = "mzz11035_black_xl"
new = "mzz11035_black_xl_{}".format(a)
str_replaced = str_to_replace.replace(old, new)
print(str_replaced)
</code></pre>