ValueError: Grouper and axis must be same length

Question

I have a dataframe with 38 columns, one of them is Time. I established a bin frame space

timeframe=[\'4-6\',\'7-9\',\'10-12\',\'13-15\',\'16-18\',\'19-21\',\         


        

Answer 1

I believe need create new column:

df['bins'] = pd.cut(df['time'],bins,retbins=True, labels=timeframe)
groups=df.groupby('bins')

But is possible you get some NaNs in new column, because values outside of range 4-24, so groupby silently remove these rows.