install python collections
问题 i'm trying to install a program called qiime http://qiime.org/install/install.html and I have finished installing prerequisites and building and installing as per the instructions but I'm stuck because python cant find defaultdict Counter. I googled to install defaultdict but I found nothing. How do you install defaultdict and counter? This is the error I'm getting. Thanks casey@casey-laptop:~/Downloads/Qiime-1.5.0/tests$ cd casey@casey-laptop:~$ align_seqs.py -h Traceback (most recent call