<p>我正在尝试制作一个程序,在字符串中搜索“bob”并打印它出现的次数。
代码如下:</p>
<pre><code>s = 'mbobobboobooboo'
numbob = 0
for i in range(len(s) ) :
u = s[i]
if u == 'o':
g = i
if g != 0 and g != len(s) :
if (s[g+1]) == 'b' and (s[g-1]) == 'b': #this line is the problam
numbob += 1
print("Number of times bob occurs is: " +str(numbob) )
</code></pre>
<p>我得到字符串索引超出范围的错误,我似乎无法修复它。有什么建议吗</p>