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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 command_line_interfaces(self):
 """Return the CommandLine classes from each provider. """

        interfaces = []
        for _, module in self.modules.items():
            for entry in dir(module):
                if entry.endswith('CommandLine'):
                    interfaces.append((module, entry))
        return interfaces