<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Your wrote : <div class="">
                
        
        
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                                        <div class="column"><p class=""><span style="font-size: 9.000000pt; font-family: 'Courier'" class="">list.pop</span><span style="font-size: 12pt;" class="">(</span><span style="font-size: 16pt;" class="">[</span><span style="font-size: 12pt; font-style: oblique;" class="">i</span><span style="font-size: 16pt;" class="">]</span><span style="font-size: 12pt;" class="">)</span></p></div></div></div></div></div><div class="">which doesn’t work on my ipython ; instead </div><div class="">
                
        
        
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                                        <div class="column"><p class=""><span style="font-size: 9.000000pt; font-family: 'Courier'" class="">list.pop</span><span style="font-size: 12pt;" class="">(</span><span style="font-size: 12pt; font-style: oblique;" class="">i</span><span style="font-size: 12pt;" class="">)</span></p></div></div></div></div></div><div class="">works fine.</div><div class=""><br class=""></div><div class="">Don’t know if it’s of any help. I’ve read all chapters from 1 to 15, and it is amazingly useful. Thanks a lot.</div><div class=""><br class=""></div><div class="">Christian</div><div class=""><br class=""></div></body></html>