python - Pandas with Decimal? -

i'm calculating standard deviations giving floatingpointerrors. wanted try converting data series decimal (using https://docs.python.org/3/library/decimal.html), see if fixes issue.

i can't seem make pandas series of decimal.

how can take normal pd.series of float64 , convert pd.series of decimal, such can do:

series.pct_change().ewm(span=35, min_periods=35).std()

would work?

def column_round(decimals):      return partial(series.round, decimals=decimals)  df.apply(column_round(2))

alternatively lets use np.vectorize can use decimal.quantize function rounding, leave variable decimal instead of np.float64

npquantize = np.vectorize(decimal.decimal.quantize)

i have been looking , seems solve issue pct_change

ts.diff().div(ts.shift(1))

M16