<s>
Pyspread	B-Language
is	O
a	O
non-traditional	O
spreadsheet	B-Application
.	O
</s>
<s>
Cells	O
in	O
pyspread	B-Language
's	O
grid	O
accept	O
expressions	O
in	O
the	O
Python	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
A	O
cell	O
can	O
return	O
any	O
Python	B-Language
object	O
,	O
which	O
allows	O
calculations	O
with	O
vectors	O
,	O
matrices	B-Architecture
,	O
fractions	O
,	O
arbitrary	B-Algorithm
precision	I-Algorithm
numbers	I-Algorithm
and	O
symbols	B-Algorithm
.	O
</s>
<s>
Therefore	O
,	O
pyspread	B-Language
follows	O
an	O
approach	O
that	O
is	O
similar	O
to	O
the	O
spreadsheet	B-Application
SIAG	O
from	O
Siag	B-Application
Office	I-Application
.	O
</s>
<s>
Besides	O
text	O
,	O
pyspread	B-Language
can	O
display	O
bitmap	O
and	O
vector	O
images	O
in	O
its	O
cells	O
.	O
</s>
<s>
It	O
provides	O
a	O
graphical	O
front-end	O
for	O
creating	O
matplotlib	B-Language
charts	O
.	O
</s>
<s>
Pyspread	B-Language
can	O
import	O
and	O
export	O
data	O
from	O
and	O
to	O
CSV	O
files	O
and	O
Microsoft	B-Application
Excel	I-Application
xls	O
files	O
.	O
</s>
<s>
Spreadsheets	B-Application
can	O
be	O
exported	O
to	O
files	O
in	O
Portable	B-Application
Document	I-Application
Format	I-Application
and	O
Scalable	B-Application
Vector	I-Application
Graphics	I-Application
format	O
.	O
</s>
<s>
Pyspread	B-Language
runs	O
on	O
Linux	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
and	O
Ubuntu	B-Operating_System
.	O
</s>
<s>
Pyspread	B-Language
is	O
developed	O
and	O
maintained	O
by	O
Martin	O
Manns	O
.	O
</s>
<s>
It	O
is	O
licensed	O
under	O
the	O
GPL-3.0-or-later	B-License
license	O
and	O
therefore	O
is	O
free	B-Application
software	I-Application
.	O
</s>
