module 'pandas' has no attribute 'rolling_apply'

Question

I am using pandas with version 0.23.4 and the below code is giving me the error - "module 'pandas' has no attribute 'rolling_apply'"

Below is the function call:

df['perLow'] = pd.rolling_apply(df.low, 2, add_percentage_diff)

Any help with fixing this error is much appreciated.

Answer 1

The pd.rolling_* family of functions were replaced by Rolling objects associated with DataFrames around v0.18.

Use Rolling.apply:

df['low'].rolling(2).apply(add_percentage_diff)