def __init__(self, expression, precision=None, **extra):
expressions = [expression]
if precision is not None:
expressions.append(self._handle_param(precision, 'precision', six.integer_types))
super(GeoHash, self).__init__(*expressions, **extra)
python类integer_types()的实例源码
def __getitem__(self, index):
"Gets the Feature at the specified index."
if isinstance(index, six.integer_types):
# An integer index was given -- we cannot do a check based on the
# number of features because the beginning and ending feature IDs
# are not guaranteed to be 0 and len(layer)-1, respectively.
if index < 0:
raise OGRIndexError('Negative indices are not allowed on OGR Layers.')
return self._make_feature(index)
elif isinstance(index, slice):
# A slice was given
start, stop, stride = index.indices(self.num_feat)
return [self._make_feature(fid) for fid in range(start, stop, stride)]
else:
raise TypeError('Integers and slices may only be used when indexing OGR Layers.')
def check_geom(result, func, cargs):
"Checks a function that returns a geometry."
# OGR_G_Clone may return an integer, even though the
# restype is set to c_void_p
if isinstance(result, six.integer_types):
result = c_void_p(result)
if not result:
raise GDALException('Invalid geometry pointer returned from "%s".' % func.__name__)
return result
def check_srs(result, func, cargs):
if isinstance(result, six.integer_types):
result = c_void_p(result)
if not result:
raise SRSException('Invalid spatial reference pointer returned from "%s".' % func.__name__)
return result
# ### Other error-checking routines ###
def check_pointer(result, func, cargs):
"Makes sure the result pointer is valid."
if isinstance(result, six.integer_types):
result = c_void_p(result)
if result:
return result
else:
raise GDALException('Invalid pointer returned from "%s"' % func.__name__)
def srs(self, value):
"""
Sets the spatial reference used in this GDALRaster. The input can be
a SpatialReference or any parameter accepted by the SpatialReference
constructor.
"""
if isinstance(value, SpatialReference):
srs = value
elif isinstance(value, six.integer_types + six.string_types):
srs = SpatialReference(value)
else:
raise ValueError('Could not create a SpatialReference from input.')
capi.set_ds_projection_ref(self._ptr, srs.wkt.encode())
self._flush()
def _set_srs(self, srs):
"Sets the SpatialReference for this geometry."
# Do not have to clone the `SpatialReference` object pointer because
# when it is assigned to this `OGRGeometry` it's internal OGR
# reference count is incremented, and will likewise be released
# (decremented) when this geometry's destructor is called.
if isinstance(srs, SpatialReference):
srs_ptr = srs.ptr
elif isinstance(srs, six.integer_types + six.string_types):
sr = SpatialReference(srs)
srs_ptr = sr.ptr
else:
raise TypeError('Cannot assign spatial reference with object of type: %s' % type(srs))
capi.assign_srs(self.ptr, srs_ptr)
def _set_srid(self, srid):
if isinstance(srid, six.integer_types):
self.srs = srid
else:
raise TypeError('SRID must be set with an integer.')
def transform(self, coord_trans, clone=False):
"""
Transforms this geometry to a different spatial reference system.
May take a CoordTransform object, a SpatialReference object, string
WKT or PROJ.4, and/or an integer SRID. By default nothing is returned
and the geometry is transformed in-place. However, if the `clone`
keyword is set, then a transformed clone of this geometry will be
returned.
"""
if clone:
klone = self.clone()
klone.transform(coord_trans)
return klone
# Depending on the input type, use the appropriate OGR routine
# to perform the transformation.
if isinstance(coord_trans, CoordTransform):
capi.geom_transform(self.ptr, coord_trans.ptr)
elif isinstance(coord_trans, SpatialReference):
capi.geom_transform_to(self.ptr, coord_trans.ptr)
elif isinstance(coord_trans, six.integer_types + six.string_types):
sr = SpatialReference(coord_trans)
capi.geom_transform_to(self.ptr, sr.ptr)
else:
raise TypeError('Transform only accepts CoordTransform, '
'SpatialReference, string, and integer objects.')
def _set_ptr(self, ptr):
# Only allow the pointer to be set with pointers of the
# compatible type or None (NULL).
if isinstance(ptr, six.integer_types):
self._ptr = self.ptr_type(ptr)
elif ptr is None or isinstance(ptr, self.ptr_type):
self._ptr = ptr
else:
raise TypeError('Incompatible pointer type')
def from_bbox(cls, bbox):
"Constructs a Polygon from a bounding box (4-tuple)."
x0, y0, x1, y1 = bbox
for z in bbox:
if not isinstance(z, six.integer_types + (float,)):
return GEOSGeometry('POLYGON((%s %s, %s %s, %s %s, %s %s, %s %s))' %
(x0, y0, x0, y1, x1, y1, x1, y0, x0, y0))
return Polygon(((x0, y0), (x0, y1), (x1, y1), (x1, y0), (x0, y0)))
# ### These routines are needed for list-like operation w/ListMixin ###
def insert(self, index, val):
"Standard list insert method"
if not isinstance(index, six.integer_types):
raise TypeError("%s is not a legal index" % index)
self[index:index] = [val]
def display_for_value(value, empty_value_display, boolean=False):
from django.contrib.admin.templatetags.admin_list import _boolean_icon
if boolean:
return _boolean_icon(value)
elif value is None:
return empty_value_display
elif isinstance(value, datetime.datetime):
return formats.localize(timezone.template_localtime(value))
elif isinstance(value, (datetime.date, datetime.time)):
return formats.localize(value)
elif isinstance(value, six.integer_types + (decimal.Decimal, float)):
return formats.number_format(value)
else:
return smart_text(value)
def _sqlite_format_dtdelta(conn, lhs, rhs):
"""
LHS and RHS can be either:
- An integer number of microseconds
- A string representing a timedelta object
- A string representing a datetime
"""
try:
if isinstance(lhs, six.integer_types):
lhs = str(decimal.Decimal(lhs) / decimal.Decimal(1000000))
real_lhs = parse_duration(lhs)
if real_lhs is None:
real_lhs = backend_utils.typecast_timestamp(lhs)
if isinstance(rhs, six.integer_types):
rhs = str(decimal.Decimal(rhs) / decimal.Decimal(1000000))
real_rhs = parse_duration(rhs)
if real_rhs is None:
real_rhs = backend_utils.typecast_timestamp(rhs)
if conn.strip() == '+':
out = real_lhs + real_rhs
else:
out = real_lhs - real_rhs
except (ValueError, TypeError):
return None
# typecast_timestamp returns a date or a datetime without timezone.
# It will be formatted as "%Y-%m-%d" or "%Y-%m-%d %H:%M:%S[.%f]"
return str(out)
def quote_value(self, value):
# The backend "mostly works" without this function and there are use
# cases for compiling Python without the sqlite3 libraries (e.g.
# security hardening).
import sqlite3
try:
value = sqlite3.adapt(value)
except sqlite3.ProgrammingError:
pass
# Manual emulation of SQLite parameter quoting
if isinstance(value, type(True)):
return str(int(value))
elif isinstance(value, (Decimal, float)):
return str(value)
elif isinstance(value, six.integer_types):
return str(value)
elif isinstance(value, six.string_types):
return "'%s'" % six.text_type(value).replace("\'", "\'\'")
elif value is None:
return "NULL"
elif isinstance(value, (bytes, bytearray, six.memoryview)):
# Bytes are only allowed for BLOB fields, encoded as string
# literals containing hexadecimal data and preceded by a single "X"
# character:
# value = b'\x01\x02' => value_hex = b'0102' => return X'0102'
value = bytes(value)
hex_encoder = codecs.getencoder('hex_codec')
value_hex, _length = hex_encoder(value)
# Use 'ascii' encoding for b'01' => '01', no need to use force_text here.
return "X'%s'" % value_hex.decode('ascii')
else:
raise ValueError("Cannot quote parameter value %r of type %s" % (value, type(value)))
def lazy_number(func, resultclass, number=None, **kwargs):
if isinstance(number, six.integer_types):
kwargs['number'] = number
proxy = lazy(func, resultclass)(**kwargs)
else:
original_kwargs = kwargs.copy()
class NumberAwareString(resultclass):
def __mod__(self, rhs):
if isinstance(rhs, dict) and number:
try:
number_value = rhs[number]
except KeyError:
raise KeyError('Your dictionary lacks key \'%s\'. '
'Please provide it, because it is required to '
'determine whether string is singular or plural.'
% number)
else:
number_value = rhs
kwargs['number'] = number_value
translated = func(**kwargs)
try:
translated = translated % rhs
except TypeError:
# String doesn't contain a placeholder for the number
pass
return translated
proxy = lazy(lambda **kwargs: NumberAwareString(), NumberAwareString)(**kwargs)
proxy.__reduce__ = lambda: (_lazy_number_unpickle, (func, resultclass, number, original_kwargs))
return proxy
def __getitem__(self, idx):
# Prevent unnecessary reevaluation when accessing BoundField's attrs
# from templates.
if not isinstance(idx, six.integer_types + (slice,)):
raise TypeError
return list(self.__iter__())[idx]
def __getitem__(self, index):
if not isinstance(index, (slice,) + six.integer_types):
raise TypeError
# The object_list is converted to a list so that if it was a QuerySet
# it won't be a database hit per __getitem__.
if not isinstance(self.object_list, list):
self.object_list = list(self.object_list)
return self.object_list[index]
def get_geometry_type(self, table_name, geo_col):
cursor = self.connection.cursor()
try:
# Querying the `geometry_columns` table to get additional metadata.
type_col = 'type' if self.connection.ops.spatial_version < (4, 0, 0) else 'geometry_type'
cursor.execute('SELECT coord_dimension, srid, %s '
'FROM geometry_columns '
'WHERE f_table_name=%%s AND f_geometry_column=%%s' % type_col,
(table_name, geo_col))
row = cursor.fetchone()
if not row:
raise Exception('Could not find a geometry column for "%s"."%s"' %
(table_name, geo_col))
# OGRGeomType does not require GDAL and makes it easy to convert
# from OGC geom type name to Django field.
ogr_type = row[2]
if isinstance(ogr_type, six.integer_types) and ogr_type > 1000:
# SpatiaLite versions >= 4 use the new SFSQL 1.2 offsets
# 1000 (Z), 2000 (M), and 3000 (ZM) to indicate the presence of
# higher dimensional coordinates (M not yet supported by Django).
ogr_type = ogr_type % 1000 + OGRGeomType.wkb25bit
field_type = OGRGeomType(ogr_type).django
# Getting any GeometryField keyword arguments that are not the default.
dim = row[0]
srid = row[1]
field_params = {}
if srid != 4326:
field_params['srid'] = srid
if (isinstance(dim, six.string_types) and 'Z' in dim) or dim == 3:
field_params['dim'] = 3
finally:
cursor.close()
return field_type, field_params
def geojson(self, precision=8, crs=False, bbox=False, **kwargs):
"""
Returns a GeoJSON representation of the geometry field in a `geojson`
attribute on each element of the GeoQuerySet.
The `crs` and `bbox` keywords may be set to True if the user wants
the coordinate reference system and the bounding box to be included
in the GeoJSON representation of the geometry.
"""
backend = connections[self.db].ops
if not backend.geojson:
raise NotImplementedError('Only PostGIS and SpatiaLite support GeoJSON serialization.')
if not isinstance(precision, six.integer_types):
raise TypeError('Precision keyword must be set with an integer.')
options = 0
if crs and bbox:
options = 3
elif bbox:
options = 1
elif crs:
options = 2
s = {'desc': 'GeoJSON',
'procedure_args': {'precision': precision, 'options': options},
'procedure_fmt': '%(geo_col)s,%(precision)s,%(options)s',
}
return self._spatial_attribute('geojson', s, **kwargs)
