in courses/machine_learning/deepdive2/structured/solutions/serving/application/lib/pyasn1/type/univ.py [0:0]
def setComponentByPosition(self, idx, value=noValue,
verifyConstraints=True,
matchTags=True,
matchConstraints=True):
"""Assign |ASN.1| type component by position.
Equivalent to Python sequence item assignment operation (e.g. `[]`).
Parameters
----------
idx : :class:`int`
Component index (zero-based). Must either refer to existing
component (if *componentType* is set) or to N+1 component
otherwise. In the latter case a new component of given ASN.1
type gets instantiated and appended to |ASN.1| sequence.
Keyword Args
------------
value: :class:`object` or :py:class:`~pyasn1.type.base.PyAsn1Item` derivative
A Python value to initialize |ASN.1| component with (if *componentType* is set)
or ASN.1 value object to assign to |ASN.1| component.
If `value` is not given, schema object will be set as a component.
verifyConstraints : :class:`bool`
If :obj:`False`, skip constraints validation
matchTags: :class:`bool`
If :obj:`False`, skip component tags matching
matchConstraints: :class:`bool`
If :obj:`False`, skip component constraints matching
Returns
-------
self
"""
componentType = self.componentType
componentTypeLen = self._componentTypeLen
if self._componentValues is noValue:
componentValues = []
else:
componentValues = self._componentValues
try:
currentValue = componentValues[idx]
except IndexError:
currentValue = noValue
if componentTypeLen:
if componentTypeLen < idx:
raise error.PyAsn1Error('component index out of range')
componentValues = [noValue] * componentTypeLen
if value is noValue:
if componentTypeLen:
value = componentType.getTypeByPosition(idx)
if isinstance(value, base.ConstructedAsn1Type):
value = value.clone(cloneValueFlag=componentType[idx].isDefaulted)
elif currentValue is noValue:
raise error.PyAsn1Error('Component type not defined')
elif not isinstance(value, base.Asn1Item):
if componentTypeLen:
subComponentType = componentType.getTypeByPosition(idx)
if isinstance(subComponentType, base.SimpleAsn1Type):
value = subComponentType.clone(value=value)
else:
raise error.PyAsn1Error('%s can cast only scalar values' % componentType.__class__.__name__)
elif currentValue is not noValue and isinstance(currentValue, base.SimpleAsn1Type):
value = currentValue.clone(value=value)
else:
raise error.PyAsn1Error('%s undefined component type' % componentType.__class__.__name__)
elif ((verifyConstraints or matchTags or matchConstraints) and
componentTypeLen):
subComponentType = componentType.getTypeByPosition(idx)
if subComponentType is not noValue:
subtypeChecker = (self.strictConstraints and
subComponentType.isSameTypeWith or
subComponentType.isSuperTypeOf)
if not subtypeChecker(value, verifyConstraints and matchTags,
verifyConstraints and matchConstraints):
if not componentType[idx].openType:
raise error.PyAsn1Error('Component value is tag-incompatible: %r vs %r' % (value, componentType))
if componentTypeLen or idx in self._dynamicNames:
componentValues[idx] = value
elif len(componentValues) == idx:
componentValues.append(value)
self._dynamicNames.addField(idx)
else:
raise error.PyAsn1Error('Component index out of range')
self._componentValues = componentValues
return self