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Update 01-数据读取与导出.md

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`@@ -117,6 +117,7 @@ df = pd.read_csv(r'D:\big_data.csv', \`
`117`	`117`	`skiprows = lambda x: x>0 and np.random.rand()>0.01) #先随机读取1%数据`
`118`	`118`
`119`	`119`	`# 读取feather文件`
	`120`	`+# 安装库:pip install feather-format`
`120`	`121`	`df = feather.read_dataframe('data.feather') #原生`
`121`	`122`	`df = pd.read_feather('data.feather') #pandas`
`122`	`123`
`@@ -229,4 +230,4 @@ content = "<html><body>" + table + "<br>" + "</body></html>"`
`229`	`230`
`230`	`231`	`<br/>`
`231`	`232`
`232`		`-\| [< <目录](./README.md) \| [02-数据表检查 >](./02-数据表检查.md) \| [返回顶部 ↑](#01-数据读取与导出) \|`
	`233`	`+\| [< <目录](./README.md) \| [02-数据表检查 >](./02-数据表检查.md) \| [返回顶部 ↑](#01-数据读取与导出) \|`

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