I get the above mentioned error in this problem. Can anyone please help me correct it?
Example data frame: column
ID with 3 numbers and column
count with 3 numbers.
key='count', the sum of the values in the
count value will be obtained. If
key='ID', the sum of the values in the
ID column will be summed.
def sum_column(X,key='count'): S = X[key].sum() return S