<s>
FastAPI	B-Library
is	O
a	O
modern	O
Web	B-Application
framework	I-Application
for	O
building	O
RESTful	B-Protocol
APIs	I-Protocol
in	O
Python	B-Language
.	O
</s>
<s>
FastAPI	B-Library
is	O
based	O
on	O
Pydantic	O
and	O
type	O
hints	O
to	O
validate	O
,	O
serialize	B-Application
,	O
and	O
deserialize	B-Application
data	O
.	O
</s>
<s>
It	O
also	O
automatically	O
generates	O
OpenAPI	B-Architecture
documentation	O
for	O
APIs	B-General_Concept
built	O
with	O
it	O
.	O
</s>
<s>
FastAPI	B-Library
fully	O
supports	O
asynchronous	B-Operating_System
programming	I-Operating_System
and	O
can	O
run	O
on	O
Gunicorn	B-Application
and	O
ASGI	B-Language
servers	O
such	O
as	O
and	O
,	O
making	O
it	O
a	O
good	O
choice	O
for	O
production	O
environments	O
.	O
</s>
<s>
FastAPI	B-Library
was	O
the	O
third	O
most	O
loved	O
web	B-Application
framework	I-Application
in	O
Stack	O
Overflow	O
2021	O
Developer	O
Survey	O
.	O
</s>
<s>
Large	O
companies	O
like	O
Uber	B-Application
and	O
Netflix	O
use	O
it	O
to	O
develop	O
some	O
of	O
their	O
applications	O
.	O
</s>
