def renameCol(self, cnameOld, cnameNew):
    '\n        renames column cnameOld into cnameNew\n        '
    c = self.cindex(cnameOld)
    self.table[0][c] = cnameNew
renames column cnameOld into cnameNew
def renameCol(self, cnameOld, cnameNew):
    '\n        \n        '
    c = self.cindex(cnameOld)
    self.table[0][c] = cnameNew