<s>
tox	B-Application
is	O
a	O
command-line	O
driven	O
automated	B-Application
testing	I-Application
tool	I-Application
for	O
Python	B-Language
,	O
based	O
on	O
the	O
use	O
of	O
virtualenv	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
for	O
both	O
manually-invoked	O
testing	O
from	O
the	O
desktop	O
,	O
or	O
continuous	O
testing	O
within	O
continuous	O
integration	O
frameworks	O
such	O
as	O
Jenkins	B-Language
or	O
Travis	B-Application
CI	I-Application
.	O
</s>
<s>
Its	O
use	O
began	O
to	O
become	O
popular	O
in	O
the	O
Python	B-Language
community	O
from	O
around	O
2015	O
.	O
</s>
<s>
tox	B-Application
acts	O
a	O
wrapper	O
for	O
both	O
virtual	O
environments	O
and	O
test	B-Application
automation	I-Application
tools	O
,	O
to	O
simplify	O
the	O
consistent	O
testing	O
of	O
Python	B-Language
code	I-Language
across	O
a	O
range	O
of	O
environments	O
.	O
</s>
<s>
This	O
gives	O
a	O
consistent	O
container-based	O
testing	O
environment	O
on	O
both	O
desktops	O
and	O
integration	O
servers	O
.	O
</s>
<s>
It	O
also	O
allows	O
testing	O
in	O
a	O
range	O
of	O
Python	B-Language
environments	O
,	O
such	O
as	O
Python	B-Language
2	O
or	O
Python	B-Language
3	O
specific	O
contexts	O
.	O
</s>
<s>
Tox	B-Application
is	O
configured	O
through	O
a	O
simple	O
tox.ini	O
file	O
in	O
INI	O
format	O
.	O
</s>
<s>
tox	B-Application
is	O
also	O
convenient	O
as	O
a	O
simple	O
smoke	O
test	O
on	O
a	O
newly	O
installed	O
,	O
or	O
freshly-updated	O
system	O
.	O
</s>
