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# 只读取前2行和指定列的数据
df = pd.read_csv('https://raw.githubusercontent.com/selva86/datasets/master/Cars93_miss.csv',nrows=2,usecols=['Model','Length'])
#>		Model	Length
0	Integra	177
1	Legend	195
                                      2021-12-05 20:04:24
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