<s>
pycassa	B-Operating_System
is	O
a	O
client	B-Protocol
library	B-Library
for	O
Apache	B-Application
Cassandra	I-Application
.	O
</s>
<s>
It	O
is	O
a	O
Python	B-Language
client	B-Protocol
library	B-Library
having	O
following	O
features	O
:	O
</s>
<s>
Like	O
Apache	B-Application
Cassandra	I-Application
,	O
pycassa	B-Operating_System
is	O
open-source	B-Application
.	O
</s>
<s>
The	O
following	O
code	O
adds	O
the	O
user	O
name	O
with	O
the	O
corresponding	O
password	O
to	O
the	O
column	B-Application
families	I-Application
(	O
pycassa.ColumnFamily	O
)	O
USER	O
and	O
USERNAME	O
:	O
</s>
