本文整理匯總了Python中psycopg2.Binary.prepare方法的典型用法代碼示例。如果您正苦於以下問題：Python Binary.prepare方法的具體用法？Python Binary.prepare怎麽用？Python Binary.prepare使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類psycopg2.Binary的用法示例。
在下文中一共展示了Binary.prepare方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: PostGISAdapter
# 需要導入模塊: from psycopg2 import Binary [as 別名]
# 或者: from psycopg2.Binary import prepare [as 別名]
class PostGISAdapter(object):
def __init__(self, geom):
"Initializes on the geometry."
# Getting the WKB (in string form, to allow easy pickling of
# the adaptor) and the SRID from the geometry.
self.ewkb = bytes(geom.ewkb)
self.srid = geom.srid
self._adapter = Binary(self.ewkb)
def __conform__(self, proto):
# Does the given protocol conform to what Psycopg2 expects?
if proto == ISQLQuote:
return self
else:
raise Exception('Error implementing psycopg2 protocol. Is psycopg2 installed?')
def __eq__(self, other):
if not isinstance(other, PostGISAdapter):
return False
return (self.ewkb == other.ewkb) and (self.srid == other.srid)
def __str__(self):
return self.getquoted()
def prepare(self, conn):
"""
This method allows escaping the binary in the style required by the
server's `standard_conforming_string` setting.
"""
self._adapter.prepare(conn)
def getquoted(self):
"Returns a properly quoted string for use in PostgreSQL/PostGIS."
# psycopg will figure out whether to use E'\\000' or '\000'
return str('ST_GeomFromEWKB(%s)' % self._adapter.getquoted().decode())示例2: PostGISAdapter
# 需要導入模塊: from psycopg2 import Binary [as 別名]
# 或者: from psycopg2.Binary import prepare [as 別名]
class PostGISAdapter(object):
def __init__(self, obj, geography=False):
"""
Initialize on the spatial object.
"""
self.is_geometry = isinstance(obj, (Geometry, PostGISAdapter))
# Getting the WKB (in string form, to allow easy pickling of
# the adaptor) and the SRID from the geometry or raster.
if self.is_geometry:
self.ewkb = bytes(obj.ewkb)
self._adapter = Binary(self.ewkb)
else:
self.ewkb = to_pgraster(obj)
self.srid = obj.srid
self.geography = geography
def __conform__(self, proto):
# Does the given protocol conform to what Psycopg2 expects?
if proto == ISQLQuote:
return self
else:
raise Exception('Error implementing psycopg2 protocol. Is psycopg2 installed?')
def __eq__(self, other):
if not isinstance(other, PostGISAdapter):
return False
return (self.ewkb == other.ewkb) and (self.srid == other.srid)
def __hash__(self):
return hash((self.ewkb, self.srid))
def __str__(self):
return self.getquoted()
def prepare(self, conn):
"""
This method allows escaping the binary in the style required by the
server's `standard_conforming_string` setting.
"""
if self.is_geometry:
self._adapter.prepare(conn)
def getquoted(self):
"""
Return a properly quoted string for use in PostgreSQL/PostGIS.
"""
if self.is_geometry:
# Psycopg will figure out whether to use E'\\000' or '\000'.
return str('%s(%s)' % (
'ST_GeogFromWKB' if self.geography else 'ST_GeomFromEWKB',
self._adapter.getquoted().decode())
)
else:
# For rasters, add explicit type cast to WKB string.
return "'%s'::raster" % self.ewkb示例3: PatchedAdapter
# 需要導入模塊: from psycopg2 import Binary [as 別名]
# 或者: from psycopg2.Binary import prepare [as 別名]
class PatchedAdapter(PostGISAdapter):
def __init__(self, *args, **kwargs):
super(PatchedAdapter, self).__init__(*args, **kwargs)
self._adapter = Binary(self.ewkb)
def prepare(self, conn):
# Pass the connection to the adapter: this allows escaping the binary
# in the style required by the server's standard_conforming_string setting.
self._adapter.prepare(conn)
def getquoted(self):
"Returns a properly quoted string for use in PostgreSQL/PostGIS."
# psycopg will figure out whether to use E'\\000' or '\000'
return 'ST_GeomFromEWKB(%s)' % self._adapter.getquoted()示例4: PostGISAdapter
# 需要導入模塊: from psycopg2 import Binary [as 別名]
# 或者: from psycopg2.Binary import prepare [as 別名]
class PostGISAdapter(object):
def __init__(self, geom):
"Initializes on the geometry."
# Getting the WKB (in string form, to allow easy pickling of
# the adaptor) and the SRID from the geometry.
self.ewkb = str(geom.ewkb)
self.srid = geom.srid
self._adapter = Binary(self.ewkb)
def __conform__(self, proto):
# Does the given protocol conform to what Psycopg2 expects?
if proto == ISQLQuote:
return self
else:
m = 'Error implementing psycopg2 protocol. Is psycopg2 installed?'
raise Exception(m)
def __eq__(self, other):
return (self.ewkb == other.ewkb) and (self.srid == other.srid)
def __str__(self):
return self.getquoted()
def prepare(self, conn):
# Pass the connection to the adapter: this allows escaping the binary
# in the style required by the server's
# standard_conforming_string setting
self._adapter.prepare(conn)
def getquoted(self):
"Returns a properly quoted string for use in PostgreSQL/PostGIS."
# psycopg will figure out whether to use E'\\000' or '\000'
return 'ST_GeomFromEWKB(%s)' % self._adapter.getquoted()
def prepare_database_save(self, unused):
return self