擅长:python、mysql、java
<blockquote>
<p><code>string.count(s, sub[, start[, end]])</code>:</p>
<p>Return the number of <strong>(non-overlapping)</strong> occurrences of substring sub in string s[start:end]. Defaults for start and end and interpretation of negative values are the same as for slices.</p>
</blockquote>
<p>来源:<a href="https://docs.python.org/2/library/string.html">https://docs.python.org/2/library/string.html</a></p>