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由于旧版Pandas库在对inputs执行mean()方法时,会跳过不可计算的类型,从而忽略报错直接计算出数据;而高版本pandas库会对数据类型进行严格检查,从而触发报错“TypeError: can only concatenate str (not "int") to str”。修正后的代码将对数据类型进行筛选并计算,规避报错内容