[Python] Why does my GeneralizedTime pyasn1 implementation report 'SyntaxError: invalid...

Here is my asn1 grammar representation:

MiepPullWtdr ::= [0] SEQUENCE
{
timeStamp [8] GeneralizedTime
}


I need help in implementing the same using pyasn1.

Here is my code snippet:

from pyasn1.type import univ, namedtype, tag, char, namedval, useful

class MiepPullWtdr(univ.Sequence):
componentType = namedtype.NamedTypes(namedtype.NamedType('timeStamp', useful.GeneralizedTime().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 8)))

)

miepPullWtdr = MiepPullWtdr()
miepPullWtdr.setComponentByName('timeStamp', '201103081200Z')
print(miepPullWtdr.prettyPrint())


I also tried:

componentType = namedtype.NamedTypes(namedtype.NamedType('timeStamp',useful.GeneralizedTime().tagSet(tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 8)))


Both doesn't work and gives a weird error regrading Syntax error:

miepPullWtdr = MiepPullWtdr()
^
SyntaxError: invalid syntax


I have checked the commas and brackets. All seem to be correct.

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