定义：`yum`的命令行接口。
- main(args)
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Run the yum program from a command line interface.
- hotshot(func, *args, **kwargs)
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Profile the given function using the hotshot profiler.
Parameters: func – the function to profile Returns: the return code given by the hotshot profiler
- cprof(func, *args, **kwargs)
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Profile the given function using the cprof profiler.
Parameters: func – the function to profile Returns: the return code given by the cprof profiler
- print_stats(stats)
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Print out information from a Stats object.
Parameters: stats – the Stats object to print information from
- user_main(args, exit_code=False)
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Call one of the multiple main() functions based on environment variables.
Parameters: - args – command line arguments passed into yum
- exit_code – if exit_code is True, this function will exit python with its exit code when it has finished executing. Otherwise, it will return its exit code.
Returns: the exit code from yum execution