<p>我遇到了一个无法解决的类型错误</p>
<p>这是为字典构造计数器:</p>
<pre><code>counts = dict()
names = ['csev','cwen', 'csev', 'zqian', 'cwen']
#makes new tally for new names and updates existing names
for name in names :
if name not in counts:
counts[name] = 1
else:
counts[name] = counts[name + 1]
print(counts)
</code></pre>
<p>应输出:</p>
<pre><code>{'csev':2, 'zqian':1, 'cwen':2}
</code></pre>