def takeColumns(self, columns):
        s = []

        for c in columns:
            s.append(self.mString[c])

        self.mString = "".join(s)
Create or replace an attachment.
dataset/ETHPy150Open CGATOxford/cgat/CGAT/Mali.py/AlignedString.takeColumns--crossover with--dataset/ETHPy150Open djc/couchdb-python/couchdb/client.py/Database.put_attachment