TeletexString type

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

Creates TeletexString type or object.

TeletexString objects are immutable and duck-type Python 2 unicode or Python 3 str. When used in octet-stream context, TeletexString type assumes “iso-8859-1” encoding.

Parameters:
  • value (unicode, str, bytes or TeletexString 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 TeletexString 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 TeletexString object is used in octet-stream context.
Raises:

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

Note

The TeletexString type models character string that can be entered from a sophisticated text processing machines (by 20-th century standards) featuring letters from multiple alphabets (308 characters!), digits, punctuation marks and escape sequences.

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

Creates a copy of a TeletexString type or object.

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

Parameters:
  • value (unicode, str, bytes or TeletexString 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 TeletexString 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 TeletexString object is used in octet-stream context.
Returns:

new instance of TeletexString type/value

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

Creates a copy of a TeletexString type or object.

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

Parameters:
  • value (unicode, str, bytes or TeletexString 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 TeletexString 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 TeletexString object is used in octet-stream context.
Returns:

new instance of TeletexString type/value

tagSet = TagSet((), Tag(tagClass=0, tagFormat=0, tagId=20))

Default TagSet object for TeletexString objects

hasValue()

Indicate if TeletexString 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 TeletexString 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 TeletexString type, False otherwise.
isSuperTypeOf(other, matchTags=True, matchConstraints=True)

Examine TeletexString 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 TeletexString type, False otherwise.