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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 change_mpl_backend(self, command):
 """ If the user is trying to change Matplotlib backends with %matplotlib, send the same command again to the kernel to correctly change it. Fixes issue 4002 """

        if command.startswith('%matplotlib') and \
          len(command.splitlines()) == 1:
            if not 'inline' in command:
                self.silent_execute(command)