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Update 03-数据表清洗.md

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03-数据表清洗.md

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`‎03-数据表清洗.md`

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Original file line number	Diff line number	Diff line change
`@@ -149,6 +149,13 @@ for col in columns:`
`149`	`149`	`df[col] = df[col].astype('float')`
`150`	`150`	`df[col].fillna(-999, inplace = True)`
`151`	`151`	`df[col] = df[col].astype('int')`
	`152`	`+`
	`153`	`+# 批量转化为浮点格式`
	`154`	`+for i in df.columns:`
	`155`	`+ try:`
	`156`	`+ df[i] = df[i].apply(lambda x:float(x))`
	`157`	`+ except:`
	`158`	`+ pass`
`152`	`159`	```
`153`	`160`
`154`	`161`	`<br/>`

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