Append values from dataframe column to list
You could try this script if you need to append one column only:
a_list = df['iso'].tolist()For extending a list by appending elements from the iterable, use extend:
a_list = []a_list.extend(df['iso'].tolist())a_list.extend(df['country'].tolist())print (a_list)['x', 'y', 'z', 'w', 'a', 'b', 'c', 'd']Another solution is to use numpy.ravel with transpose:
a_list = df[['iso','country']].values.T.ravel().tolist()print (a_list)['x', 'y', 'z', 'w', 'a', 'b', 'c', 'd']
extend does what you ask for . If you try do this with append, you can do something like:
import itertoolsa_list = []a_list.append(df.iso.tolist())a_list.append(df.country.tolist())a_list=list(itertools.chain.from_iterable(a_list))print(a_list)Output
['x', 'y', 'z', 'w', 'a', 'b', 'c', 'd']