def matchOnlyAtCol(n):
    def verifyCol(strg,locn,toks):
        if col(locn,strg) != n:
            raise ParseException(strg,locn,"matched token not at column %d" % n)
    return verifyCol
Helper method for defining parse actions that require matching at a specific
dataset/ETHPy150Open pypa/pip/pip/_vendor/pyparsing.py/matchOnlyAtCol