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I only need the first column

index                       A         B         C 
"11.08.2001 11:00:00"   12345   1234521    128984
"11.08.2001 12:00:00"   82345   1345216    432898
"11.08.2001 13:00:00"   52345   1234521    228984
"11.08.2001 14:00:00"   13345   1234521    128984
"11.08.2001 15:00:00"   12345   5934521    528984
"11.08.2001 16:00:00"   12345   9234521    628984
...                       ...       ...       ...
"11.08.2017 21:00:00"   12376   8712253    124556

The files are very large (sometimes 10GB) How to pull only the index RAM efficiently?

HR_quantile
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1 Answers1

1

You sample set doesn't say if it is a csv or not. If it is, this should do the trick:

pd.read_csv(r"file.csv",usecols=[0])
Serge de Gosson de Varennes
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