<p>我的清单是:</p>
<pre><code>groupA=['Russia', 'Egypt', 'Saudi Arabia', 'Uruguay']
</code></pre>
<p>所以我想打印出所有相互比赛的球队的独特组合:</p>
<pre><code>Russia Vs. Egypt
Russia Vs. Saudi Arabia
Russia Vs. Uruguay
Egypt Vs. Saudi Arabia
Egypt Vs. Uruguay
Saudi Arabia Vs. Uruguay
</code></pre>
<p>我可以用for循环吗?你知道吗</p>
<p>这可以做到:</p>
<pre><code>groupA = ['Russia', 'Egypt', 'Saudi Arabia', 'Uruguay']
for index, country in enumerate(groupA):
for rival in groupA[index+1:]:
print('%s vs %s'%(country, rival) )
</code></pre>