Identify consecutive same values in Pandas Dataframe, with a Groupby

Question

I have the following dataframe df:

data={\'id\':[1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2],
      \'value\':[2,2,3,2,2,2,3,3,3,3,1,4,1,1,1,4,4,1,1,1,1,1]}         


        

Answer 1

#try this simpler version
a= pd.Series([1,1,1,2,3,4,5,5,5,7,8,0,0,0])
b= a.groupby([a.ne(0), a]).transform('size').ge(3).astype('int')
#ge(x) <- x is the number of consecutive repeated values 
print b