ISO646String type

class pyasn1.type.char.ISO646String(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates ISO646String type or object.

ISO646String objects are immutable and duck-type Python 2 unicode or Python 3 str. When used in octet-stream context, ISO646String type assumes “us-ascii” encoding.

Parameters:
  • value (unicode, str, bytes or ISO646String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or ISO646String class instance.
  • tagSet (TagSet) – Object representing non-default ASN.1 tag(s)
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when ISO646String object is used in octet-stream context.
Raises:

pyasn1.error.PyAsn1Error – On constraint violation or bad initializer.

Note

The ISO646String type is an alias to the VisibleString type

clone(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates a copy of a ISO646String type or object.

Any parameters to the clone() method will replace corresponding properties of the ISO646String object.

Parameters:
  • value (unicode, str, bytes or ISO646String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or ISO646String class instance.
  • tagSet (TagSet) – Object representing non-default ASN.1 tag(s)
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when ISO646String object is used in octet-stream context.
Returns:

new instance of ISO646String type/value

subtype(value=NoValue(), implicitTag=Tag(), explicitTag=Tag(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates a copy of a ISO646String type or object.

Any parameters to the subtype() method will be added to the corresponding properties of the ISO646String object.

Parameters:
  • value (unicode, str, bytes or ISO646String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or ISO646String class instance.
  • implicitTag (Tag) – Implicitly apply given ASN.1 tag object to caller’s TagSet, then use the result as new object’s ASN.1 tag(s).
  • explicitTag (Tag) – Explicitly apply given ASN.1 tag object to caller’s TagSet, then use the result as new object’s ASN.1 tag(s).
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when ISO646String object is used in octet-stream context.
Returns:

new instance of ISO646String type/value

hasValue()

Indicate if ISO646String object represents ASN.1 value or ASN.1 type.

The PyASN1 type objects can only participate in types comparison and serve as a blueprint for serialization codecs to resolve ambiguous types.

The PyASN1 value objects can additionally participate to most of built-in Python operations.

Returns:boolTrue if object is ASN.1 value, False otherwise.
isSameTypeWith(other, matchTags=True, matchConstraints=True)

Examine ISO646String type for equality with other ASN.1 type.

ASN.1 tags (tag) and constraints (constraint) are examined when carrying out ASN.1 types comparison.

No Python inheritance relationship between PyASN1 objects is considered.

Parameters:other (a pyasn1 type object) – Class instance representing ASN.1 type.
Returns:boolTrue if other is ISO646String type, False otherwise.
isSuperTypeOf(other, matchTags=True, matchConstraints=True)

Examine ISO646String type for subtype relationship with other ASN.1 type.

ASN.1 tags (tag) and constraints (constraint) are examined when carrying out ASN.1 types comparison.

No Python inheritance relationship between PyASN1 objects is considered.

Parameters:other (a pyasn1 type object) – Class instance representing ASN.1 type.
Returns:boolTrue if other is a subtype of ISO646String type, False otherwise.