擅长:python、mysql、java
<blockquote>
<p>when creating buttons you cannot set command= to function with parantheses '()' unless using lambda like this.</p>
</blockquote>
<pre><code>self.traceButton = Button(self.main_inner_frame,text="Trace",
command= lambda: Second.printSecondLine())
</code></pre>
<p>但这也应该起作用:</p>
^{pr2}$