擅长:python、mysql、java
<p>注意错误消息<code>TypeError: unsupported operand type(s) for /: 'str' and 'float'</code></p>
<pre><code>>>> kgweight = lbweight/2.20462
Traceback (most recent call last):
File "<pyshell#17>", line 1, in <module>
kgweight = lbweight/2.20462
TypeError: unsupported operand type(s) for /: 'str' and 'float'
>>>
</code></pre>
<p>如果2.20462是一个浮点数,那么这里哪一个是字符串?文档对<a href="http://docs.python.org/2/library/functions.html#raw_input" rel="nofollow">raw_input</a>说了些什么?在</p>
<blockquote>
<p>If the prompt argument is present, it is written to standard output
without a trailing newline. The function then reads a line from input,
converts it to a string (stripping a trailing newline), and returns
that. When EOF is read, EOFError is raised.</p>
</blockquote>