Precision reading and writing data frames to csv

[Paulo da Silva]

Hi!

I have a dir with lots of csv files. These files are updated +- once a
day. I could see that some values are converted, during output, to very
close values but with lots of digits. I understand that is caused by the
internal bits' representation of the float/double values.

Now my question is: Is it possible the occurrence of successive
cumulative errors? I mean reading a file, adding lines or change few
ones but keeping the most of the other lines untouched and, even so,
existent untouched lines keep always changing?

Thanks