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0714下午1,review,
2022-07-16 01:45:00 【啊六六六】
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ctrl+鼠标左单击,
斜杠不能写注释,括号里可以写注释,

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加上hdfs头部声明,
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r代表绝对字符串,不进行转义,
f后可添加变量,

\\t,双斜杠代表不是转义,
或加r代表绝对字符串,

阶段是全局标号,

已看完:::::::
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