/usr/lib/python3/dist-packages/postgresql/types/io/__init__.py is in python3-postgresql 1.1.0-2+b3.
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# .types.io - I/O routines for packing and unpacking data
##
"""
PostgreSQL type I/O routines--packing and unpacking functions.
This package manages the modules providing I/O routines.
The name of the function describes what type the function is intended to be used
on. Normally, the fucntions return a structured form of the serialized data to
be used as a parameter to the creation of a higher level instance. In
particular, most of the functions that deal with time return a pair for
representing the relative offset: (seconds, microseconds). For times, this
provides an abstraction for quad-word based times used by some configurations of
PostgreSQL.
"""
import sys
from itertools import cycle, chain
from ... import types as pg_types
io_modules = {
'builtins' : (
pg_types.BOOLOID,
pg_types.CHAROID,
pg_types.BYTEAOID,
pg_types.INT2OID,
pg_types.INT4OID,
pg_types.INT8OID,
pg_types.FLOAT4OID,
pg_types.FLOAT8OID,
pg_types.ABSTIMEOID,
),
'pg_bitwise': (
pg_types.BITOID,
pg_types.VARBITOID,
),
'pg_network': (
pg_types.MACADDROID,
pg_types.INETOID,
pg_types.CIDROID,
),
'pg_system': (
pg_types.OIDOID,
pg_types.XIDOID,
pg_types.CIDOID,
pg_types.TIDOID,
),
'pg_geometry': (
pg_types.POINTOID,
pg_types.LSEGOID,
pg_types.BOXOID,
pg_types.CIRCLEOID,
),
'stdlib_datetime' : (
pg_types.DATEOID,
pg_types.INTERVALOID,
pg_types.TIMEOID,
pg_types.TIMETZOID,
pg_types.TIMESTAMPOID,
pg_types.TIMESTAMPTZOID
),
'stdlib_decimal' : (
pg_types.NUMERICOID,
),
'stdlib_uuid' : (
pg_types.UUIDOID,
),
'stdlib_xml_etree' : (
pg_types.XMLOID,
),
# Must be db.typio.identify(contrib_hstore = 'hstore')'d
'contrib_hstore' : (
'contrib_hstore',
),
}
# OID -> module name
module_io = dict(
chain.from_iterable((
zip(x[1], cycle((x[0],))) for x in io_modules.items()
))
)
if sys.version_info[:2] < (3,3):
def load(relmod):
return __import__(__name__ + '.' + relmod, fromlist = True, level = 1)
else:
def load(relmod):
return __import__(relmod, globals = globals(), locals = locals(), fromlist = [''], level = 1)
def resolve(oid):
io = module_io.get(oid)
if io is None:
return None
if io.__class__ is str:
module_io.update(load(io).oid_to_io)
io = module_io[oid]
return io
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