[BioPython] os.system problem with clustalw

[Michael Fahy]

Speaking of the clustalw command line, is it possible to get clustalw to
output a phylogenetic tree file, rather than an alignment file, via
command line arguments?

----------------
> Emanuel Hey
wrote: 
>> Thanks much for responding 
>> 
>> ok, I had no idea Clustalw was so particular about its command
line 
>> flags. 
> 
> Its confused me in the
past too!