Precision lost while using read_csv in pandas
It is only display problem, see docs:
#temporaly set display precisionwith pd.option_context('display.precision', 10): print df 0 1 2 3 4 5 6 7 \0 895 2015-4-23 19 10000 LA 0.4677978806 0.477346934 0.4089938425 8 9 10 11 12 0 0.8224291972 0.8652525793 0.682994286 0.5139162227 NaN EDIT: (Thank you Mark Dickinson):
Pandas uses a dedicated decimal-to-binary converter that sacrifices perfect accuracy for the sake of speed. Passing
float_precision='round_trip'to read_csv fixes this. See the documentation for more.