To create a logo in python code:
>>> from weblogo import *
>>> fin = open('cap.fa')
>>> seqs = read_seq_data(fin)
>>> logodata = LogoData.from_seqs(seqs)
>>> logooptions = LogoOptions()
>>> logooptions.title = "A Logo Title"
>>> logoformat = LogoFormat(logodata, logooptions)
>>> eps = eps_formatter(logodata, logoformat)