<p>“u”在打印列表中的元素之前?我没有在代码中输入你。</p>
<pre><code>hobbies = []
#prompt user three times for hobbies
for i in range(3):
hobby = raw_input('Enter a hobby:')
hobbies.<a href="https://www.cnpython.com/list/append" class="inner-link">append</a>(hobby)
#print list stored in hobbies
print hobbies
</code></pre>
<p>运行此命令时,它会打印列表,但其格式如下:</p>
<pre><code>Enter a hobby: Painting
Enter a hobby: Stargazing
Enter a hobby: Reading
[u'Painting', u'Stargazing', u'Reading']
None
</code></pre>
<p>在列表的每个元素之前,这些“u”来自哪里?</p>