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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def loadInternalSheet(klass, p, **kwargs):
    'Load internal sheet of given klass.  Internal sheets are always tsv.'
    vs = klass(p.name, source=p, **kwargs)
    options._set('encoding', 'utf8', vs)
    if p.exists():
        vd.sheets.insert(0, vs)
        vs.reload.__wrapped__(vs)
        vd.sheets.pop(0)
    return vs