<s>
The	O
Python	B-Language
Package	I-Language
Index	I-Language
,	O
abbreviated	O
as	O
PyPI	B-Language
(	O
)	O
and	O
also	O
known	O
as	O
the	O
Cheese	O
Shop	O
(	O
a	O
reference	O
to	O
the	O
Monty	O
Python	B-Language
's	O
Flying	O
Circus	O
sketch	O
"	O
Cheese	O
Shop	O
"	O
)	O
,	O
is	O
the	O
official	O
third-party	O
software	B-Application
repository	I-Application
for	O
Python	B-Language
.	O
</s>
<s>
It	O
is	O
analogous	O
to	O
the	O
CPAN	B-Language
repository	O
for	O
Perl	B-Language
and	O
to	O
the	O
CRAN	O
repository	O
for	O
R	B-Language
.	O
PyPI	B-Language
is	O
run	O
by	O
the	O
Python	B-Application
Software	I-Application
Foundation	I-Application
,	O
a	O
charity	O
.	O
</s>
<s>
Some	O
package	B-Application
managers	I-Application
,	O
including	O
pip	B-Application
,	O
use	O
PyPI	B-Language
as	O
the	O
default	O
source	O
for	O
packages	O
and	O
their	O
dependencies	O
.	O
</s>
<s>
more	O
than	O
350,000	O
Python	B-Language
packages	I-Language
can	O
be	O
accessed	O
through	O
PyPI	B-Language
.	O
</s>
<s>
PyPI	B-Language
primarily	O
hosts	O
Python	B-Language
packages	I-Language
in	O
the	O
form	O
of	O
archives	O
called	O
(	O
source	O
distributions	O
)	O
or	O
precompiled	B-General_Concept
"	O
wheels.	O
"	O
</s>
<s>
PyPI	B-Language
as	O
an	O
index	O
allows	O
users	O
to	O
search	O
for	O
packages	O
by	O
keywords	O
or	O
by	O
filters	B-Application
against	O
their	O
metadata	O
,	O
such	O
as	O
free	B-License
software	I-License
license	I-License
or	O
compatibility	O
with	O
POSIX	O
.	O
</s>
<s>
A	O
single	O
entry	O
on	O
PyPI	B-Language
is	O
able	O
to	O
store	O
,	O
aside	O
from	O
just	O
a	O
package	O
and	O
its	O
metadata	O
,	O
previous	O
releases	O
of	O
the	O
package	O
,	O
precompiled	B-General_Concept
wheels	O
(	O
e.g.	O
</s>
<s>
containing	O
DLLs	O
on	O
Windows	O
)	O
,	O
as	O
well	O
as	O
different	O
forms	O
for	O
different	O
operating	B-General_Concept
systems	I-General_Concept
and	O
Python	B-Language
versions	O
.	O
</s>
<s>
The	O
Python	B-Language
Distribution	O
Utilities	O
(	O
)	O
Python	B-Language
module	O
was	O
first	O
added	O
to	O
the	O
Python	B-Language
standard	O
library	O
in	O
the	O
1.6.1	O
release	O
,	O
in	O
September	O
2000	O
,	O
and	O
in	O
the	O
2.0	O
release	O
,	O
in	O
October	O
2000	O
,	O
nine	O
years	O
after	O
first	O
python	B-Language
release	O
in	O
February	O
1991	O
,	O
with	O
the	O
goal	O
of	O
simplifying	O
the	O
process	O
of	O
installing	O
third-party	O
Python	B-Language
packages	I-Language
.	O
</s>
<s>
However	O
,	O
only	O
provided	O
the	O
tools	O
for	O
packaging	O
Python	B-Language
code	I-Language
,	O
and	O
no	O
more	O
.	O
</s>
<s>
Python	B-Language
still	O
lacked	O
a	O
centralised	O
catalog	O
for	O
packages	O
on	O
the	O
internet	O
.	O
</s>
<s>
A	O
proposal	O
to	O
create	O
a	O
comprehensive	O
centralised	O
catalog	O
,	O
hosted	O
at	O
the	O
python.org	B-Language
domain	O
,	O
was	O
later	O
finalized	O
in	O
November	O
2002	O
.	O
</s>
<s>
On	O
16	O
April	O
2018	O
,	O
all	O
PyPI	B-Language
traffic	O
began	O
being	O
served	O
by	O
a	O
more	O
modern	O
website	O
platform	O
:	O
Warehouse	O
.	O
</s>
<s>
On	O
15	O
April	O
2023	O
,	O
more	O
than	O
445,000	O
Python	B-Language
packages	I-Language
are	O
available	O
.	O
</s>
