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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 _workdir(self, line):
        '''A Docker WORKDIR command simply implies to cd to that location

           Parameters
           ==========
           line: the line from the recipe file to parse for WORKDIR

        '''
        workdir = self._setup('WORKDIR', line)
        line = "cd %s" %(''.join(workdir))
        self.install.append(line)